00450nam a2200145Ia 4500008004100000082002000041100002100061245003000082260004200112300001000154650001300164942000700177952010300184999001700287140113s9999    xx            000 0 und d  a631(047.1 K8.20  a" Norman, A. G."  aAdvances in agronomy v.20  b"New York : Academic Press Inc, 1968"  a379p.  aAgronomy  cBK  00104070aKYMbKYMd2014-01-13l0o631(047.1 K8.20pKBK1591r2014-01-13 00:00:00w2014-01-13yBK  c62649d62649