By Dasmann, Raymond Fredric, 1919-. London, New York, published for the International Union for Conservation of Nature and Natural Resources (IUCN), Morges, Switzerland and the Conservation Foundation, Washington, D.C., USA; [by] John Wiley & Sons 1973 , Published for International Union for Conservation of Nature and Natural Resources (ICUN), Morges, Switzerland and the Conservation Foundation, Washington, D.C., U.S.A. 0471196061

Place Hold on Ecological principles for economic development