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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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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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Academy Journals Public Knowledge Project under the GNU General Public License
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7.
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Use of curatorial data bases as an element to reconstruct taxonomic knowdlege: an example with Mexican papilionids and pierids (Insecta: Lepidoptera) OñateOcaña,L. - Llorente Bousquets, Jorge Enrique
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8.
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spatial and temporal variation of the diversity ants in the botanic garden from zapotitlan de las salinas valley, puebla Guzman-Mendoza, R - Herrera-Fuentes, MDC - Castaño-Meneses, G.
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9.
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An ab initio molecular dynamics calculation of the density of the liquid metallic alloy Al-Si(12)at% as a function of temperature Diaz-Celaya, JA - Valladares, AA - Valladares, RM
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10.
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Plant propagation and the ecological restoration of Mexican tropical deciduous forests Bonfil-Sanders, María del Consuelo - Trejo, I
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