https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Gonz%C3%A1lez%20Villarreal%2C%20Roberto%2C%22%20and%20su-to%3AViolencia%20escolar&sort_by=title_az&format=rss 2 0 50 ISBN:9786074131857 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=173703 ]]> México : UPN, 2014 .
263 p. : 9786074131857

]]> Place hold on La gestión de la violencia escolar /

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=173703 ISBN:9786074131031 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=155496 ]]> By González Villarreal, Roberto,.
México : UPN, 2011 .
242 p. 9786074131031

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