Yazar
George B Frisvold
4 cilt bulundu.
Cilt sonuçları
Global environmental change and agriculture
George B. Frisvold · Edward Elgar Pub
354 sayfa · 1999
Global environmental change / Environmental aspects / Climatic changes / Agriculture / Environmental auditing
Differences in agricultural research and productivity among 26 countries
George B Frisvold · U.S. Dept. of Agriculture, Economic Research Service
14 sayfa · 1991
Agriculture / Agricultural productivity / Research
Endogenous technological change in U.S. agriculture
George B Frisvold · U.S. Dept. of Agriculture, Economic Research Service
19 sayfa · 1991
Agricultural innovations / Mathematical models