https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=copydate%3A%221957%20%281977%20impr.%29.%22&sort_by=title_az&format=rss 2 0 50 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=32134 By Cole, George Douglas Howard,.
México : FCE, 1957 .
218, 29 p. , Incluye apéndice estadístico

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=32134 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=57886 By Barnett, Lincoln Kinnear,.
México : FCE, 1957 .
104 p.

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