000 00358nam a2200121Ia 4500
001 MPKV056029
008 120911s9999 xx 000 0 und d
082 _a338.1
245 _aAgricultural Economics Research vol.15-18
_c;
246 _aAgricultural Economics Research vol.15-18
260 _aWashingto
_bU S D A
_c1963-1966
650 _aAgricultural Economics
999 _c54023
_d54023