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1.
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A contribution to the knowledge of the l fauna of El Petén, Guatemala Stuart, Laurence Cooper
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2.
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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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Consilience. The Unity of Knowledge. Mario Sapag-Hagar; Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile
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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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Editorial Policy *, *; Research and Publication Office - Liceo de Cagayan University
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7.
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Editorial Policy *, *; Research and Publication Office - Liceo de Cagayan University
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8.
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Editorial Policy *, * *; Research and Publication Office - Liceo de Cagayan University
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9.
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THE EARTHQUAKE SWARM OF FEBRUARY 1981 IN MEXICO CITY, THE EARTHQUAKE SWARM OF FEBRUARY 1981 IN MEXICO CITY Havskov, J.; Instituto de Ingeniería, UNAM, México 04510, D.F.
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