Yazar
George A Pavelis
8 cilt bulundu.
George A. Pavelis · U.S. Dept. of Agriculture, Economic Research Service]
60 sayfa · 1965
Irrigation / Research
George A. Pavelis · U.S. Dept. of Agriculture, Economic Research Service, Natural Resource Economics Division
36 sayfa · 1978
Agriculture / Bibliography / Natural resources
George A. Pavelis · Economic Research Service, U.S. Dept. of Agriculture
170 sayfa · 1987
Irrigation / Irrigated Soils / Water resources development / Drainage
George A. Pavelis · Economic Research Service, U.S. Dept. of Agriculture
41 sayfa · 1973
Agricultural extension work / Agriculture / Economic aspects of Agriculture / Natural resources / Power resources
George A Pavelis · Water Resources Branch, Natural Resource Economics Division, Economic Research Service, U.S. Dept. of Agriculture
40 sayfa · 1969
Irrigation farming
George A. Pavelis · U.S. Dept. of Agriculture, Economic Research Service
30 sayfa · 1972
Natural resources
George A. Pavelis · U.S. Dept. of Agriculture, Economic Research Service, Natural Resource Economics Division
125 sayfa · 1985
Conservation of natural resources / Drainage / Economic aspects of Conservation of natural resources / Economic aspects of Drainage / Economic aspects of Irrigation
George A. Pavelis · Natural Resource Economics Division, Economic Research Service, U.S. Dept. of Agriculture
25 sayfa · 1983
Agricultural conservation / Agriculture / Economic aspects of Agriculture / Land tenure