000 00325nam a2200121Ia 4500
008 170101s1982 xx 000 0 und d
082 _a631 SHA
100 _aShaner W. W.
245 0 _aReadings in Farming Systems Research and Development
260 _aColorado
_bWestview Press
_c1982
300 _a175 p.
942 _2ddc
_cB
999 _c815516
_d815516