See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/268817766 La sistemática, base del conocimiento de la UNIVERSIDAD AUTÓNOMA DEL ESTADO DE HIDALGO Editores Atilano Contreras-Ramos Book · August 2007 CITATIONS 0 READS 1,245 4 authors, including: Some of the authors of this publication are also working on these related projects: SUSTAINABLE PRODUCTION AND CONSERVATION OF DIVERSITY PROJECT-- FRESHWATER AQUATIC MACROINVERTEBRATES COMPONENT View project Herpetofauna de la Reserva de la Biosfera Barranca de Metztitlán, Hidalgo View project Irene Goyenechea Autonomous University of Hidalgo 70 PUBLICATIONS 154 CITATIONS SEE PROFILE Ulises Iturbe Autonomous University of Hidalgo 13 PUBLICATIONS 28 CITATIONS SEE PROFILE Atilano Contreras-Ramos Universidad Nacional Autónoma de México 78 PUBLICATIONS 336 CITATIONS SEE PROFILE All content following this page was uploaded by Irene Goyenechea on 28 November 2014. The user has requested enhancement of the downloaded file.