https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=%28su%3A%22CURSOS%20POR%20CORRESPONDENCIA%22%29&sort_by=title_az&format=rss 3 0 50 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=131457 By Cruz Rincón, Jaime.
Venezuela : Centro Regional para la Educación Superior en América Latina y el Caribe, 1985 .
25 p.

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=131457 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=19815 By Erdos, Renée F..
París : UNESCO, 1979 .
167 p.

]]> Place hold on L'enseignement par correspondence /

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=19815 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=20201 By Erdos, Renée F..
Madrid : OEI, 1972 .
214 p. :

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