https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Vallejo%2C%20Bernardo%22&sort_by=title_az&format=rss 4 0 50 ISBN:9682446775 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=19618 ]]> By Vallejo, Bernardo.
México : Trillas, 1993 .
192 p. : 9682446775

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=19618 ISBN:9682450772 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=19619 ]]> By Vallejo, Bernardo.
México : Trillas, 1994 .
203 p. : 9682450772

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=19619 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=33948 By Vallejo, Bernardo.
México : Trillas, 1976 .
176 p. : , "Conforme a los objetivos del programa oficial, educación media básica, primer grado"

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=33948 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=33949 By Vallejo, Bernardo.
México : Trillas, 1977 .
192 p. : , "Conforme a los objetivos del programa oficial, educación media básica, segundo grado"

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