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Leitfaden für das zoologische Praktikum - Kükenthal, W. G. (Willy Georg), 1861 -1922 (Fischer, 1912)

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Leptodactylid frogs of the genus Eleutherodactylus from the Andes of southern Ecuador - Lynch, John D. (University of Kansas, 1979)

Leptodactylid frogs of the genus Eleutherodactylus in the Andes of northern Ecuador and adjacent Colombia - Lynch, John D. (University of Kansas, 1981)

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Manual of conchology, structural and systematic : with illustrations of the species - Tryon, George W., (George Washington), 1838 -1888 (Published by the Author, Academy of Natural Sciences, 1879)

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Manual of the vertebrates of the northern United States, including the district east of the Mississippi River, and north of North Carolina and Tennessee, exclusive of marine species - Jordan, David Starr, 1851 -1931 (Jansen, McClurg & company, 1880)

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Manual of the vertebrates of the northern United States, including the district east of the Mississippi River, and north of North Carolina and Tennessee, exclusive of marine species - Jordan, David Starr, 1851 -1931 (Jansen, McClurg, 1880)

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