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Some aspects of the cattle industry in the economy of Botswana
Isaksen, Jan, (1984)
The economics of erosion control in a subtropical watershed : a Dominican case
Veloz, Alberto, (1985)
Environmental protection and economic development in Guatemala's Western Highlands
Hoy, Don R., (1984)
Generating employment and output through rural public works
Eckholm, Erik P., (1974)
The other energy crisis
Eckholm, Erik P., (1977)
Threats to world fisheries
Eckholm, Erik P., (1976)