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Novapex : trimestriel de la Société belge de malacologie - Société belge de malacologie. (La Société, 2008)

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Nuova flora analitica d'Italia, contenente la descrizione delle piante vascolari indigene inselvatichite e largamente coltivate in Italia - Fiori, Adriano 1865 -1950 (Tipografia di M. Ricci, 1923)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1915)

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Obras completas y correspondencia científica - Ameghino, Florentino, 1853 -1911 (Taller de Impresiones Oficiales, 1918)

Obras completas y correspondencia científica - Ameghino, Florentino, 1853 -1911 (Taller de Impresiones Oficiales, 1921)

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Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1961)

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Oikos= boletín del Centro de Ecología [UNAM] (Instituto de Ecología, UNAM, 2015)

Oikos= boletín del Centro de Ecología [UNAM] (Instituto de Ecología, UNAM, 2022)

Oikos= boletín del Centro de Ecología [UNAM] (Instituto de Ecología, UNAM, 2017)

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The Orchadian - Australasian Native Orchid Society (The Society, 1995)

The Orchadian - Australasian Native Orchid Society (The Society, 1994)

The Orchadian - Australasian Native Orchid Society (The Society, 1997)

The Orchadian - Australasian Native Orchid Society (The Society, 2007)

The Orchadian - Australasian Native Orchid Society (The Society, 2017)

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The origin of human reason, being an examination of recent hypotheses concerning it - Mivart, St. George Jackson, 1827 -1900 (K. Paul, Trench, 1889)

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The origin of the human capacity - Tattersall, Ian (American Museum of Natural History, 1998)

Le origini umane; ricerche paleontologiche - Sergi, Giuseppe, 1841 -1936 (Fratelli Bocca, 1913)

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Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1896)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1899)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1900)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1906)

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Our face from fish to man; a portrait gallery of our ancient ancestors and kinsfolk together with a concise history of our best features - Gregory, William K. (William King), 1876 -1970 (G.P. Putnam's Sons, 1929)

Our household insects, an account of the insect-pests found in dwelling-houses - Butler, Edward Albert, 1845 -1925 (Longmans, Green, and co, 1893)

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Our living world; an artistic edition of the Rev. J. G. Wood's Natural history of animate creation - Wood, J. G. (John George), 1827 -1889 (S. Hess, 1885)

The outline of science : a plain story simply told - Thomson, J. Arthur (John Arthur), 1861 -1933 (G. P. Putnam's sons, 1922)

Over de ontwikkeling van het chondrocranium en de kraakbeenige wervelkolom van eenige Urodela en Anura - Peeters, Johannes Leonardis Elbertus. (G.F. Theonville, 1910)

The ox and its kindred - Lydekker, Richard, 1849 -1915 (Methuen, 1912)

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The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1974)

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Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1912)

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Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1996)

Phytoneuron (Guy L. Nesom, 2015)

Pithecanthropus erectus : eine menschen aehnliche Uebergangsform aus Java - Dubois, Eugène, 1858 -1940 (G.E. Stechert, 1915)

Pithecanthropus Erectus. Eine menschenaehnliche Uebergangsform aus Java - Dubois, Eugène, 1858 -1940 (G.E. Stechert (Alfred Hafner), 1894)

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