https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=Provider%3ACECSA%24bSEP%2C&sort_by=title_az&format=rss 3 0 50 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=19490 México : CECSA$bSEP .
72, [7] p. :

]]> Place hold on Energía :

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=19490 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=25404 México : CECSA$bSEP, 1968 .
64 p. :

]]> Place hold on Fuerza :

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=25404 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=37537 México : CECSA$bSEP, Dirección General de Enseñanzas Tecnológicas, 1969 .
92 p. :

]]> Place hold on Materiales :

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=37537