https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Caldwell%2C%20Lynton%20Keith%2C%22&sort_by=title_az&format=rss 2 0 50 ISBN:8448100956 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=16851 ]]> By Caldwell, Lynton Keith,.
Madrid : McGraw-Hill, 1996 .
xv, 25 p. , Incluye las conclusiones de la Conferencia del Medio Ambiente y Desarrollo Cumbre de la Tierra. Río de Janeiro 8448100956

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=16851 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=20359 By Caldwell, Lynton Keith,.
New York : Natural History, 1970 .
292 p.

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