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1.
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Second addition to the knowledge of the Batrachia and Reptilia of Costa Pica Cope, Edward Drinker
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2.
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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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3.
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A new dicrocoeliid (Digenea: Dicrocoeliinae) parasite of rodents from Tlaxcala, Mexico. Lamothe-Argumedo, R. - Falcon-Ordaz, J. - Garcia-Prieto, L. - Fernandez-Fernandez, J.
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4.
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Third addition to a knowledge of the Batrachia and Reptilia of Costa Rica Cope, Edward Drinker
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5.
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Contributions to our knowledge of the duration of life in vertebrate animals Flower, Stanley S
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6.
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The concise knowledge library: natural history Lydekker, Richard
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7.
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Contributions to our knowledge of the duration of life in vertebrate animals Flarer, Stanley Smith
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8.
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Abundance and species richness of Coreoidea (Hemiptera: Heteroptera) from Parque Estadual do Turvo, southern Brazil. Barcellos, A. - Schmidt, L. S. - Brailovsky, H.
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9.
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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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10.
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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) Oñate Ocaña, L - Llorente Bousquets, Jorge Enrique
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