https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=%28su%3A%22Ecolog%C3%ADa%22%29%20AND%20%28su%3A%22Estudio%20y%20ense%C3%B1anza%22%29&sort_by=title_az&format=rss 347 0 20 ISBN:9789876140591 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=144497 ]]> By Velázquez de Castro González, Federico.
Buenos Aires : Capital Intelectual, 2008 .
237 p. : 9789876140591

]]> Place hold on 25 preguntas sobre el cambio climático /

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=144497 ISBN:9681321537 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=143112 ]]> México : Diana, 1991 .
149 páginas 9681321537

]]> Place hold on 50 cosas sencillas para salvar la tierra.

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=143112 ISBN:9788498674941 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=158732 ]]> By Javna, John.
Barcelona, Esp. : Integral, 2009 .
138 p. 9788498674941

]]> Place hold on 50 cosas sencillas que tú puedes hacer para salvar la tierra /

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=158732 ISBN:9788480768160 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=147812 ]]> By Berry, Siân.
Barcelona, Esp. : Blume, 2009 .
127 p. : 9788480768160

]]> Place hold on 50 ideas para hacer tu casa y tu jardín más ecológicos /

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=147812 ISBN:9689199013 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=153767 ]]> By Solano Lartigau, Edgardo.
México : Ceiba, 2007 .
63 p. 9689199013

]]> Place hold on ABC del agua :

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=153767 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=124427 By Diozhkin, V. V..
Moscú : Mir, 1983 .
279 p. :

]]> Place hold on Acerca de la ecología /

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=124427 ISBN:8487767850 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=92471 ]]> By Bravo Berrocal, Rafael.
Málaga, Esp. : Aljibe, 1998 .
202 p. : 8487767850

]]> Place hold on Actividades educativo-complementarias en la naturaleza :

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=92471 ISBN:9706132635 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=99674 ]]> By Limón Aguirre Berlanga, Eduardo.
México : Oxford University Press-Harla, 1997 .
164 p. 9706132635

]]> Place hold on Alternativas, educacion ambiental :

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