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A contribution to the knowledge of the l fauna of El Petén, Guatemala Stuart, Laurence Cooper
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Third addition to a knowledge of the Batrachia and Reptilia of Costa Rica Cope, Edward Drinker
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3.
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Some additions to the knowledge of the anatomy, principally of the vascular system, of Hatteria, Crocodilus and certain Lacertilia Beddard, Frank E
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4.
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Contributions to our knowledge of the duration of life in vertebrate animals Flower, Stanley S
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5.
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A contribution to a knowledge of the herpetology of a portion of the savanna region of central Petén, Guatemala Stuart, Laurence Cooper
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6.
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Encuesta serohematológica en bovinos tripanosusceptibles de dos unidades agroecológicas del Valle de Aroa, Serahaematological survey in bovine tripanosensitiveness at two agroecological units of Aroa Valley Sandoval, Espartaco - Espinoza, Emir - González, Nersa - Morales C., Gustavo A. - Montilla, William - Jiménez, Delia
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Network Effects and Welfare Cultures Luttmer, Erzo - Bertrand, Marianne - Mullainathan, Sendhil
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8.
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Cora ethnozoology, l knowledge; a bio-ecological and cross cultural approach Malkin, Borys
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9.
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Sumu ethnozoology: herpetological knowledge Malkin, Borys
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10.
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Additions to the knowledge of the herpetofauna of Oaxaca, Mexico Hobart M Smith
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