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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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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5.
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Biogeography, current knowledge and conservation of threatened vascular plants characteristic of Mexican temperate forests Vega, IL - Ayala, OA - Contreras-Medina, R - Vargas, AP
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6.
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Uso y manejo de hongos silvestres en dos comunidades de la Selva Lacandona, Chiapas, México Rúan Soto, F - Cifuentes Blanco, Joaquín - Mariaca R, Ramón - Limón F, Fernando - Pérez Ramírez, L - Sierra Galván, Sigfrido
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7.
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A female songbird out-sings male conspecifics during simulated territorial intrusions Illes, AE - Yunes-Jimenez, L
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8.
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First record of genus Cerinomyces (Fungi: Dacrymycetales) in Mexico Sierra,S - Cifuentes, J
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9.
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Families on the spot: sexual signals influence parent-offspring interactions Morales, J - Alonso-Alvarez, C - Perez, C - Torres, R - Serafino, E - Velando, A
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10.
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The potential of tree rings for the study of forest succession in southern Mexico Brienen, RJW - Lebrija-Trejos, E - van Breugel, M - Bongers, F - Meave del Castillo, Jorge Arturo - Pérez-García, Eduardo Alberto - Martínez-Ramos, M
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