00265nam a2200097Ia 450000500170000000800410001705000160005810000150007424500420008926000360013120251229184536.0251229s9999    xx            000 0 und d  aHD 1411 .C6  aCohen,R.L. 4aThe Economics of agriculturecL Cohen  aCambridgeb James  Nisbetc1959