https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=Provider%3AWCEFA%2C&sort_by=title_az&format=rss 4 0 50 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=135995 New York : WCEFA, 1990. .
17 p.

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=135995 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=165391 Thailand : WCEFA, 1990 .
17 p. ;

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=165391 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=165716 Jomtien, Thailand : WCEFA, 1990 .
68 p. ;

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=165716 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=165384 New York : WCEFA, 1990 .
48 p.

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