https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Heimer%2C%20Ralph%20T.%2C%22&sort_by=title_az&format=rss 2 0 50 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=1583 By Nichols, Eugene Douglas,.
México : CECSA, 1969 .
662 p. :

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=1583 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=13106 By Heimer, Ralph T..
México : CECSA, 1967 .
5 v. , La biblioteca tiene el v.1

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