Deffar, G. (1998). Economic valuation of environmental goods in Ethiopia: A contingent valuation study of the Abiyata-Shalla lakes national parks. Sweden, Ch.: Unit for Environmental Economics Department of Economics, Gothenburg University.
Citación estilo ChicagoDeffar, Girma. Economic Valuation of Environmental Goods in Ethiopia: A Contingent Valuation Study of the Abiyata-Shalla Lakes National Parks. Sweden, Ch.: Unit for Environmental Economics Department of Economics, Gothenburg University, 1998.
Cita MLADeffar, Girma. Economic Valuation of Environmental Goods in Ethiopia: A Contingent Valuation Study of the Abiyata-Shalla Lakes National Parks. Sweden, Ch.: Unit for Environmental Economics Department of Economics, Gothenburg University, 1998.