https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Parra%2C%20Cecilia%22&sort_by=title_az&format=rss 4 0 50 ISBN:9688533343 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=15478 ]]> México : Paidós, 1997 .
299 p 9688533343

]]> Place hold on Didáctica de matemáticas :

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=15478 ISBN:9501221121 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=15479 ]]> Buenos Aires : Paidós, 1994 .
299 p. 9501221121

]]> Place hold on Didactica de matemáticas :

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=15479 ISBN:9789508085344 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=142121 ]]> By Parra, Cecilia.
Rosario, Arg. : Homo Sapiens, 2007 .
212 p. : 9789508085344

]]> Place hold on Enseñar aritmética a los más chicos :

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=142121 ISBN:9786074670004 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=162907 ]]> By Parra, Cecilia.
México : SEP : | HomoSapiens, 2008 .
212 p. : 9786074670004

]]> Place hold on Enseñar aritmética a los más chicos :

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