https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Fetz%2C%20Friedrich%22&sort_by=title_az&format=rss 2 0 50 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=26223 By Fetz, Friedrich.
Buenos Aires : Kapelusz, 1979 .
159 p. :

]]> Place hold on Gimnasia en parejas y en grupos sin elementos /

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=26223 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=56639 By Fetz, Friedrich.
Buenos Aires : Kapelusz, 1976 .
103 p. :

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