00691nam a2200205Ia 4500008004100000020001500041082001700056100002200073245008700095260004000182300000800222650001400230650002000244653002300264653002100287653002000308942001200328999001500340952013000355170901s1978    xx            000 0 und d  a0470264276  a338.16bO21O  aOelhaf, Robert C. 0aOrganic AgriculturebEconomic and Ecological Comparisons with Conventional Methods  aNew YorkbJohn Wiley and Sonsc1978  a271  aEconomics  aSocial sciences  aEcological aspects  aEconomic aspects  aOrganic farming  2ddccBK  c3224d3224  00102ddc4070aRAUbRAUd2017-10-18eWiley Eastern, CalcuttafUSDg22.95l0o338.16 O21Op25976r2017-10-18w1981-08-01yBK