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Exploitation, conservation, preservation : a geographic perspective on natural resource use 1991 Cutter, Susan L. | Renwick, Hilary Lambert | Renwick, William H. |
The economic value of wilderness : proceedings of the conference, Jackson, Wyoming, May 8-11, 1991 1992 Payne, Claire | Bowker, J. M. | Reed, Patrick C. |
The economic value of species information and its role in biodiversity conservation : case studies of Costa Rica's National Biodiversity Institute and pharmaceutical prospecting 1993 Aylward, Bruce A. | Echeverría, Jaime |