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M. CARVAJAL
Botany Departmernt, Institute of Biology, National Autonomous University of Mexico (UNAM)
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E. BARCENAS
Botany Departmernt, Institute of Biology, National Autonomous University of Mexico (UNAM)
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R. SANCHEZ
Animal Pathology Department, Faculty of Veterinary and Zootechnology (UNAM)
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S. MENDOZA
Analytical Chemistry Department, Faculty of Chemistry (UNAM)
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H. GOMEZ
Analytical Chemistry Department, Faculty of Chemistry (UNAM)
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E. CARDENAS
Plant Pathology Center, Postgraduate School of Montecillos
