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Pteridologist - British Pteridological Society. (The Society, 2018)

Pteridologist - British Pteridological Society. (The Society, 2019)

Pteridologist - British Pteridological Society. (The Society, 2020)

Pteridophyta und Anthophyta - Wettstein, Richard, Ritter von Westersheim, 1863 -1931 (K.K. Hof- und Staatsdruckerei, 1908)

The Pteridophytes of Ohio - Schaffner, John H. (John Henry), 1866 -1939 (The Academy, 1910)

Publication. Field Columbian Museum. Botanical series - Field Columbian Museum. (Field Columbian Museum, 1896)

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Pugillus plantarum imprimis Hispanicarum, quas in itinere 1851-52 - Lange, Joh., 1818 -1898 (B. Luno, 1860)

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Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1869)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1885)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1904)

The Quarterly journal of science (J. Churchill and Sons, etc, 1865)

The Quarterly journal of science (J. Churchill and Sons, etc, 1870)

The Quarterly journal of science (J. Churchill and Sons, etc, 1876)

Quarterly journal of the Florida Academy of Sciences - Florida Academy of Sciences. (Florida Academy of Sciences, 1961)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1846)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1858)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1859)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1870)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1871)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1872)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1890)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1897)

Quarterly Magazine of the High Wycombe Natural History Society - High Wycombe Natural History Society. (1866)

Rambles and reveries of a naturalist - Spiers, William. (Kelly, 1890)

Rambles in search of flowerless plants - Plues, Margaret (Journal of horticulture & cottage gardener office; [etc., etc.], 1864)

Résultats scientifiques du Congrès international de botanique, Vienne 1905 = Wissenschaftliche Ergebnisse des Internationalen botanischen Kongresses, Wien 1905 - Lotsy, Johannes Paulus, 1867 -1931 (G. Fischer, 1906)

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Recent advances in cytology - Darlington, C. D. (Cyril Dean), 1903 - (P. Blakiston's son & co., inc, 1937)

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A record of plants collected in Southern Rhodesia; arramged on Engler's system - Eyles, Fred (1916)

A record of the doctors in botany of the University of Chicago 1897-1916, presented to John Merle Coulter, professor and head of the Department of botany, by the doctors in Botany at the quarter-centennial of the university, June 1916 - University of Chicago. (1916)

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Die Regulierung des Geschlechtsverhaltnisses : bei der Vermehrung der Menschen, Tiere und Pflanzen - Düsing, Karl, 1859 - (Verlag von Gustav Fischer, 1884)

Reisen in Ost Afrika in 1859-61. Band III : Abteilung 3 Botanik - Decken, Karl Klaus von der, freiherr, 1833 -1865 ([s.n.], 1879)

Reliably hardy evergreens for fall planting : autumn 1915 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (New England Nurseries, 1915)

Remarks on the so-called woody and vascular tissues of ferns - Ogilvie, George, 1820 -1886 (Taylor and Francis, 1860)

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Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1908)

Repertorium specierum novarum regni vegetabilis. Beihefte (Verlag des Repertoriums, 1922)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1905)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1920)

Report and Proceedings of the Belfast Natural History and Philosophical Society - Belfast Natural History; Philosophical Society. (1890)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1882)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1890)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1895)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1900)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1905)

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Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1945)

Report of botanical survey of southern and central Louisiana made during the year 1870 - Featherman, A. (Americus), 1822 - (Printed at the office of the Republican, 1871)

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Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1887)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1890)

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Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1893)

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Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1924)

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Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1932)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1935)

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Report of the Geological Survey of Ohio - Geological Survey of Ohio. (Nevins & Myers, state printers, 1893)

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Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1905)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1904)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1907)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1911)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1912)

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Report of the State board of agriculture on the work of extermination of the gypsy moth - Massachusetts. State board of agriculture. (Wright & Potter printing co., state printers, 1893)

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