00441nam a2200133Ia 4500008004100000082001600041100004500057245004100102260003300143300000800176942000700184952009900191999001700290140113s9999    xx            000 0 und d  a63:574   M1  a"Spedding, C.R.W., Walsingham and Hoxey"  aBiological efficiency In agriculture  a1981bAcademic PresscLondon  a383  cBK  00104070aVTLbVTLd2014-01-13l0o63:574   M1pVBK4102r2014-01-13 00:00:00w2014-01-13yBK  c60686d60686