Gutiérrez y Gonzalez, Ernesto. creator text mx México Editorial Porrúa 1999 12 ed. , 1. réimpr. monographic spa 2 v. ( cxvii, 1225 p.) ill. 24 cm. Erenesto Gutiérrez y González. Includes bibliographical references ( p. cix - cxvii ) and index. Obligations (Law) Mexico Obligations (Law) KGF 745 .G88 1998 PUCPR 011129 20220331062727.0 253205