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CIEX Journ@l, No 9 (5) (2019), October 2019 - March 2020, is a biannually published edition by CIEX S.C. Pedro Ascencio 12, Centro, Chilpancingo, Guerrero, México. C. P. 39000, Tel. 7474947973, journal.ciex.edu.mx, Editor: Dra. María del Carmen Castillo Salazar, journal@ciex.edu.mx. Right to exclusive use 04-2016-081814195600-203, ISSN: 2395-9517, by Instituto Nacional de Derechos de Autor. Responsible for the last updating: Editorial Coordination of CIEX S.C, Hugo Enrique Mayo Castrejón, MA. Pedro Ascencio, 12, Centro, Chilpancingo, Guerrero, México. C. P. 39000. Updated: October 2019
The opinions expressed by the authors do not imply the expression of any opinion whatsoever on the part of CIEX Journal.
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