000 00272nam a2200121Ia 4500
008 170101s1978 xx 000 0 und d
082 _a631.4 OEL
100 _aOelhaf Robert C.
245 0 _aOrganic Agriculture
260 _c1978
300 _a271 p.
942 _2ddc
_cB
999 _c674216
_d674216