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1.
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Biogeographic analysis of endemic cacti of the Sierra Madre Oriental, Mexico ContrerasMedina, R - Luna Vega, Mercedes Isolda - Juárez, HSD
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2.
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The colmella auris in Amphibia Kingsbury, BF - Reed, HD
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3.
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Regenerative Vorgänge im Telencephalon von Ambystoma mexicanum Kirsche, Karla - Kirsche, Walter
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4.
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The effect of local X-ray irradiation upon the teeth and surrounding tissues in young axolotls (Siredon mexicanum) Brunst, Victor V - Shérémétiéva-Brunst, EA - Figge, Frank Henry John
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5.
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A comparison of the reactions of the irradiated parts of the bodies of two-day old mice and urodele amphibians to roentgen treatment Brunst, Victor V - Shérémétiéva-Brunst, EA - Figge, Frank Henry John
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6.
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A new capillariid (Nematoda) parasitizing Heterandria bimaculata (Heckel, 1848) (Poeciliidae) in Mexico. Caspeta-Mandujano, J. M. - Salgado-Maldonado, G. - Vazquez, G.
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7.
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Nurse rocks are more important than nurse plants in determining the distribution and establishment of globose cacti (Mammillaria) in the Tehuacan Valley, Mexico Peters, EM - Martorell-Delgado, Carlos - Ezcurra, E
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