00421nam a2200133Ia 4500008004100000082001600041100002300057245004100080260003500121300000800156942000700164952009900171999001700270140113s9999    xx            000 0 und d  a63:574   L5  a"Speeding, C.R.W."  aThe biology of agricultural systems   a1975bAcademic PresscNew York  a261  cBK  00104070aVTLbVTLd2014-01-13l0o63:574   L5pVBK2586r2014-01-13 00:00:00w2014-01-13yBK  c59267d59267