https://unillanos.metacatalogo.org/cgi-bin/koha/opac-search.pl?q=ccl=an%3A3999.&sort_by=relevance&format=rss 3 0 50 ISBN:9588051169 https://unillanos.metacatalogo.org/cgi-bin/koha/opac-detail.pl?biblionumber=21807 By Umaña Luna, Eduardo.
Bogotá : Universidad Nacional de Colombia, 1998 .
184 páginas : 9588051169

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]]> https://unillanos.metacatalogo.org/cgi-bin/koha/opac-detail.pl?biblionumber=21807 ISBN:9500258900 https://unillanos.metacatalogo.org/cgi-bin/koha/opac-detail.pl?biblionumber=31753 By Appleyard, Bryan.
Buenos Aires : El Ateneo, 2004 .
336 páginas : 9500258900

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