https://biblioteca.cun.edu.co/cgi-bin/koha/opac-search.pl?q=ccl=an%3A42431&sort_by=relevance&format=rss 2 0 50 ISBN:9582006889 https://biblioteca.cun.edu.co/cgi-bin/koha/opac-detail.pl?biblionumber=11326 By Barrera Morales, Marcos Fidel.
Bogotá : Cooperativa Editorial Magisterio, 2003 .
95 P. 9582006889

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]]> https://biblioteca.cun.edu.co/cgi-bin/koha/opac-detail.pl?biblionumber=11326 ISBN:847738956X https://biblioteca.cun.edu.co/cgi-bin/koha/opac-detail.pl?biblionumber=13627 By Albert, Hans.
Madrid : Síntesis, 2002 .
238 p. 847738956X

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