21.
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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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22.
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A contribution to the knowledge of variation in Opheodrys vernalis (Harlan), with the description of a new subspecies Grobman, Arnold B
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23.
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Spindly leg syndrome in frogs: present knowledge and future directions to elucidate its causes Marlett, James H - Victor B Eichler - Michelle Fellows-Hagemeister
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24.
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The land classification system of the San Nicolás Zoyatlán (S Mexico) nahuatl indigenous community: A basis for a suitable parametric soil use proposal Cervantes-Gutiérrez, V - Gama-Catro, JE - Hernández-Cárdenas, G - Meave del Castillo, Jorge Arturo
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25.
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Ciberinfraestructura para Literatura Especializada en Ciencias Biomédicas Calderón Rojas, R
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