An introduction to bacterial diseases of plants - Smith, Erwin F. (Erwin Frink), 1854 -1927 (W. B. Saunders company, 1920)

An introduction to botany - Lindley, John, 1799 -1865 (Longman, Orme, Brown, Green, and Longmans, 1839)

An introduction to California plant life - Ornduff, Robert (University of California Press, 1974)

Introduction to cryptogamic botany - Berkeley, M. J. (Miles Joseph), 1803 -1889 (H. Bailliere, 1857)

Introduction to cryptogamic botany - Berkeley, M. J. (Miles Joseph), 1803 -1889 (H. Bailliere; [etc.,etc], 1857)

An introduction to modern genetics - Waddington, C. H. (Conrad Hal), 1905 -1975 (The Macmillan company, 1939)

Introduction to plant geography and some related sciences - Polunin, Nicholas (McGraw-Hill, 1960)

An introduction to the chemistry of plant products - Haas, Paul, 1877 - (Longmans, 1917)

An Introduction to the chemistry of plant products - Haas, Paul, 1877 - (Longman's, Green and co, 1929)

Introduction to the chemistry of plant products - Haas, Paul, 1877 - (Longmans, Green and co, 1913)

An introduction to the chemistry of plant products - Haas, Paul, 1877 - (Longmans, Green, 1917)

An introduction to the chemistry of plant products - Haas, Paul, 1877 - (Longmans, Green, and co, 1921)

An introduction to the chemistry of plant products - Haas, Paul, 1877 - (Longmans, Green, 1928)

An introduction to the embryology of angiosperms - Maheshwari, P. (Panchanan), 1904 -1966 (McGraw-Hill, 1950)

An introduction to the flora of Natal and Zululand - Bews, J. W. (John William), 1884 -1938 (City Printing Works, 1921)

An introduction to the structure and reproduction of plants - Fritsch, Felix Eugene, 1879 -1954 (Bell, 1920)

An introduction to the structure and reproduction of plants - Fritsch, Felix Eugene, 1879 -1954 (G. Bell and sons ltd, 1920)

Invasive alien flora and fauna in South Africa : expertise and bibliography - South African National Biodiversity Institute. (South African National Biodiversity Institute, 2007)

Inventory of seeds and plants imported - United States. Bureau of Plant Industry. (G.P.O, 1914)

Inventory of seeds and plants imported - United States. Bureau of Plant Industry. (G.P.O, 1913)

Inventory of seeds and plants imported - United States. Bureau of Plant Industry. (G.P.O, 1921)

Inventory of seeds and plants imported - United States. Bureau of Plant Industry. (G.P.O, 1922)

Inventory of seeds and plants imported - United States. Bureau of Plant Industry. (G.P.O, 1919)

Inventory of seeds and plants imported - United States. Bureau of Plant Industry. (G.P.O, 1920)

Inventory of seeds and plants imported - United States. Bureau of Plant Industry. (G.P.O, 1923)

An investigation into Alberta grown alkaloidal plants - University of Alberta. Department of Pharmacy. (University of Alberta, 1935)

An investigation of the abnormal shedding of young fruits of the Washington navel oranges - Coit, J. Eliot, 1880 - (University of California press, 1919)

Iowa bird life - Iowa Ornithologists' Union. (Iowa Ornithologists' Union, 1978)

Irish ethno-botany and the evolution of medicine in Ireland - Moloney, Michael Francis. (M. H. Gill, 1919)

Isaac F. Holton and John Torrey correspondence, 1840-1870 - Holton, Isaac F. (Isaac Farwell) (1857)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1822)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1831)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1833)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1839)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1840)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1841)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1845)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1847)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1848)