Parks and progress : protected areas and economic development in Latin America and the Caribbean
1993
Barzetti, Valerie |
Economic aspects
Can wildlife pay for itself?
1993
Holdgate, Martin W. |
Wildlife utilization and game ranching : report of a study of recent progress in this field in southern Africa
1976
Mossman, Sue Lee |
Mossman, Archie S. |
The importance and values of wild plants and animals in Africa
1981
Sale, J. B. (John Benjamin) |