Yazar
Klaus F Alt
2 cilt bulundu.
Cilt sonuçları
Economics and the environment
Klaus F. Alt · Center for Agricultural and Rural Development, Iowa State University
54 sayfa · 1977
Agricultural ecology / Environmental policy / Farm management / Linear programming / Sediment control
Soil erosion
Klaus F Alt · U.S. Dept. of Agriculture, Economic Research Service
Sayfa sayısı yok · 1989
Economic aspects / Economic aspects of Soil erosion / Soil erosion / Statistics