https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=copydate%3A%221971%20%281976%20impr.%29.%22&sort_by=title_az&format=rss 4 0 50 ISBN:8424911814 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=35454 ]]> By Robins, Robert Henry.
Madrid : Gredos, 1971 .
488 p. 8424911814

]]> Place hold on Lingüística general :

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=35454 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=44842 By Warren, E. Kirby.
México : Diana, 1971 .
141 p.

]]> Place hold on Planeación a largo plazo /

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=44842 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=46835 By Van Den Berghe, Pierre Louis.
México : FCE, 1971 .
257 p.

]]> Place hold on Problemas raciales /

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=46835 ISBN:8430906371 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=54510 ]]> By González Seara, Luis.
Madrid : Tecnos, 1971 .
368 p. 8430906371

]]> Place hold on La sociología :

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=54510