00490nam a2200145Ia 4500 140224s9999 xx 000 0 und d 581.133.11:631.1(669) 1975.10 (082.2) L7 Ayanaba, A.,ed. Biological nitrogen fixation in farming systems of the tropics. Chichester John Wiley & Sons 1977 xi,377p. Dart, P.J., jt. ed. Edited by A.Ayanaba and P.J.Dart. Nitrogen fixation,Farming systems 0 0 0 0 KSD KSD 2014-02-24 0 581.133.11:631.1(669) 1975.10 (082.2) L7 4160 2014-02-24 00:00:00 2014-02-24 BK 0 0 0 0 KSD KSD 2014-02-24 0 581.133.11:631.1(669) 1975.10 (082.2) L7 1741 2014-02-24 00:00:00 2014-02-24 BK 97473 97473