Oesterreichische botanische Zeitschrift (A. Skofitz, 1919)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1921)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1852)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1853)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1854)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1855)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1856)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1857)

Offer 454 : April/May 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1953)

Offer 644 : June/July 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1953)

Offer 653 : Sept./Oct. 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1953)

Öfversigt af Finska vetenskaps-societetens förhandlingar - Suomen Tiedeseura (s.n.], 1863)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1850)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1851)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1852)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1853)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1868)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1869)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1880)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1884)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1887)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1894)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1898)

Ohio Biological Survey notes - Ohio Biological Survey. (Ohio Biological Survey, 2016)

The Ohio journal of science - Ohio Academy of Science. (Ohio Academy of Science, 1909)

The Ohio journal of science - Ohio Academy of Science. (Ohio Academy of Science, 1912)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1910)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1912)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1913)

On British wild flowers considered in relation to insects - Lubbock, John, Sir, 1834 -1913 (MacMillan, 1890)

On British wild flowers considered in relation to insects - Lubbock, John, Sir, 1834 -1913 (Macmillan, 1890)

On British wild flowers considered in relation to insects - Lubbock, John, Sir, 1834 -1913 (Macmillan, 1909)

On buds and stipules - Lubbock, John, Sir, 1834 -1913 (K. Paul, Trench, Trübner, 1899)

On buds and stipules - Lubbock, John, Sir, 1834 -1913 (K. Paul, Trench, Trübner & Co., ltd, 1899)

On ensilage of green forage crops in silos; experience with ensilage at Echo Dale farm, also the practical experience of twenty-five practical farmers - Stevens, Henry R. (1881)

On the direction assumed by plants - Macaire, Isaac-François, 1796 -1869 ([s.n.], 1847)

On the flora of Australia : its origin, affinities, and distribution : being an introductory essay to the flora of Tasmania - Hooker, Joseph Dalton, 1817 -1911 (Lovell Reeve, 1859)

On the geology and natural history of the upper Missouri :Being the substance of a report made to Lieut. G.K. Warren, T.E. U.S.A - Hayden, F. V. (Ferdinand Vandeveer), 1829 -1887 (Printed by C. Sherman & son, 1862)

On the naturalised weeds and other plants in South Australia - Schomburgk, Richard, 1811 -1891 (E. Spiller, Acting Govt. Printer, 1879)

On the origin of species - Darwin, Charles, 1809 -1882 (D. Appleton and Co, 1871)

On the origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (Henry Frowde, 1907)

On the origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (H. Frowde, Oxford University Press, 1907)

On the origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (John Murray, Albemarle Street, 1859)

On the origin of species by means of natural selection; or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton and Co, 1860)

On the origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (John Murray, 1860)

On the origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (John Murray, 1859)

On the origin of species by the means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (Odhams Press, 1872)

On the popular names of British plants, being an explanation of the origin and meaning of the names of our indigenous and most commonly cultivated species - Prior, R. C. Alexander (Richard Chandler Alexander), 1809 -1902 (Williams and Norgate, 1870)

On the sources of the nitrogen of vegetation; with special reference to the question whether plants assimilate free or uncombined nitrogen - Gilbert, Joseph Henry, 1817 -1901 (Printed by Taylor and Francis, 1862)

One-hundred and ninth annual catalogue of high class seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.M. Thorburn & Co, 1910)

One hundred and second annual catalogue of high-class seeds, 1903 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.M. Thorburn & Co, 1903)

One-hundred-and-sixth annual catalogue of high-class seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.M. Thorburn & Co, 1907)

One hundredth anniversary, 1835-1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wilson S. Brower Co., Inc, 1935)

The Ontario natural science bulletin - Wellington Field Naturalists' Club. (Wellington Field Naturalists' Club, 1912)

The open book of nature : an introduction to nature study - Hall, Charles A. (Charles Albert), 1872 -1965 (Adam and Charles Black, 1911)

Opera e periodicis collata - Vries, Hugo de, 1848 -1935 (A. Oosthoek, 1918)

The orchids in the Ottawa District : floristics, phytogeography, population studies and historical review / Joyce M. Reddoch and Allan H. Reddoch - Ottawa Field-Naturalists' Club (The Ottawa Field-Naturalists' Club, 1997)

The organic constituents of higher plants: their chemistry and interrelationships - Robinson, Trevor. (Burgess Pub. Co, 1963)

Organic materia medica : including the standard remedies of the leading pharmacopoeas as well as those articles of the newer materia medica ... and of the preparations made therefrom by Parke, Davis & Co. ... - Parke, Davis & Company ([s.n.], 1888)

Organographie der Pflanzen, insbesondere der Archegoniaten und Samenpflanzen - Goebel, K. (Karl), 1855 -1932 (G. Fischer, 1913)

The origin and development of the pycnidium ... - Kempton, F. E. (Forrest Ellwood), 1883 - (Botanical gazette, 1919)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (D. Appleton, 1886)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (Hafner Pub. Co, 1890)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (Appleton, 1892)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (D. Appleton and Co, 1908)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (D. Appleton and company, 1902)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (K. Paul, Trench, 1884)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (D. Appleton, 1885)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (Paul, Trench, 1886)

The origin of species - Darwin, Charles, 1809 -1882 (Literary Classics, 1900)

The origin of species - Darwin, Charles, 1809 -1882 (P.F. Collier, 1909)

The origin of species by means of natural selecti : or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (1904)

The origin of species by means of natural selection, or, the preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (John Murray, 1872)

The origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (John Murray, 1880)

The origin of species by means of natural selection; or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (J. Murray, 1886)

The origin of species by means of natural selection : or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (Merrill and Baker, 1900)

The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (A.L. Burt, 1899)

The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (A.L. Burt, 1894)

The origin of species by means of natural selection; or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton and Company, 1889)

The origin of species by means of natural selection; or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton and Company, 1909)

The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton and Company, 1917)

The origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (J. Murray, 1888)

The origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (J. Murray, 1902)

The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton, 1899)

The origin of species by means of natural selection : or The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (Hurst, 1872)

Origin of species by means of natural selection, or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (P. F. Collier, 1902)

Origin of species by means of natural selection, or the preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (P. F. Collier, 1905)

Origin of species - Darwin, Charles, 1809 -1882 (H.M. Caldwell Co, 1900)

The origin of the species by means of natural selection - Darwin, Charles, 1809 -1882 (J. Murray, 1910)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1890)

O.S.U. naturalist - Ohio State University. Biological Club. (Biological Club of Ohio State University, 1903)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1894)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1896)

Our 25th anniversary, 1917-1942 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (William M. Hunt & Co, 1942)

Our 50th anniversary, 1905-1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Burnett Bros., Inc, 1955)

Our early wild flowers a study of the herbaceous plants blooming in early spring in the northern states and Canada - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (McClelland, Goodchild & Stewart, 1916)

Our early wild flowers : a study of the herbaceous plants blooming in early spring in the northern states - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (Scribner, 1916)