Informe final sobre una propuesta estrategia preliminar para la conservación de areas silvestres sobresalientes del Ecuador
1976
Putney, Allen D. |
Conservation strategies
Conservation of New World parrots : proceedings of the ICBP parrot working group meeting St. Lucia, 1980
1980
Pasquier, Roger F. |
Informationen zu Naturschutz und Landschaftspflege in Nordwestdeutschland : band 2, Tümpel - Teiche - Schlatts
1980
Akkermann, Remmer |
Twenty years of soil conservation in Eastern Africa
1993
Lundgren, Lill |
The catchment approach to soil conservation in Kenya
1992
Admassie, Yeraswarq |
Conserving Russia's biological diversity : an analytical framework and initial investment portfolio
1994
Krever, Vladimir |
Dinerstein, Eric |
Olson, David |
Williams, Laura |
Biodiversity, temperate ecosystems, and global change
1994
Boyle, Timothy James Butler |
Boyle, Christopher E. B. |
Espacios naturales protegidos
1993
Fernandez de Tejada, Antonio |
Castroviejo Bolívar, Miguel |
Purroy Iraizoz, Francisco José |
Araújo, Joaquín |
Wildlife and national parks in Nigeria 1962
1965
Petrides, George A. |