00481nam a2200133Ia 4500008004100000082002900041100002700070245007000097260003700167300000700204942000700211952011200218999001700330140113s9999    xx            000 0 und d  a"631.001.6""1970""   L1"  a"Black, C.A. et al�"  aAgronomy in a changing world and Research needs for the seventies  a1971b"ASA, CSSA,& SSSA"cU.S.A.  a65  cBK  00104070aVTLbVTLd2014-01-13l0o"631.001.6""1970""   L1"pVBK1657r2014-01-13 00:00:00w2014-01-13yBK  c58336d58336