https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=pl%3A%22Geneva%3A%20IBE%3B%20Paris%3A%20UNESCO%2C%201958.%22&sort_by=title_az&format=rss 2 0 50 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=138480 Geneva: IBE; Paris: UNESCO, 1958. .
432 p.

]]> Place hold on International yearbbok of education, Vol. XX, 1958.

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=138480 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=165138 Geneva : | Paris : IBE, | UNESCO, 1958 .
432 p.

]]> Place hold on International yearbook of education, Vol. XX, 1958.

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