https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Flavell%2C%20John%20H.%2C%22&sort_by=title_az&format=rss 2 0 50 ISBN:8477740879 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=13983 ]]> By Flavell, John H..
Madrid : Visor, 1985 .
479 p. 8477740879

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=13983 ISBN:0195008782 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=54856 ]]> By Elkind, David,.
New York : Oxford University, 1969 .
503 p. : , Ensayo en honor de Jean Piaget 0195008782

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