(1981). Economics of environmental and natural resources policy. Westview Pr.
Chicago-čujuhus (17. p.)Economics of Environmental and Natural Resources Policy. Boulder, Colo: Westview Pr, 1981.
MLA-čujuhus (9. p.)Economics of Environmental and Natural Resources Policy. Westview Pr, 1981.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.