00458nam a2200133Ia 4500008004100000082001600041100003100057245006700088260003800155300000800193942000700201952009900208999001700307140113s9999    xx            000 0 und d  a631.84   L7  a"Ayanaba, A. & Dart, P.J."  aBiological Nitrogen fixation in farming systems of the tropics  a1977bJohn Wiley & SonscNew York  a377  cBK  00104070aVTLbVTLd2014-01-13l0o631.84   L7pVBK3621r2014-01-13 00:00:00w2014-01-13yBK  c60205d60205