https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=Provider%3ACECSA%24bCONAFE%2C&sort_by=title_az&format=rss 2 0 50 ISBN:9682603137 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=34781 ]]> By Mendoza, Jaime Alfonso.
México : CECSA$bCONAFE, 1982 .
149 p. : 9682603137

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=34781 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=37232 México : CECSA$bCONAFE, 1974 .
238 p. : , "Secundaria abierta. Libro de texto"

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