005340000a22001690004500 0471994995 100 631.8470913 AYA Ajanaba, A Dest, P J Biological Nitrogen fixation in farming systems proceedings of the symposium held at the international institute of tropical agriculture Chichester, John Wiley & Sons 1977 377 Agriculture - Tropics - Congresses / Nitrogen fixation - congresses BK 346843 346843 0 0 0 0 KAUCOAV KAUCOAV 2014-05-02 0 631.8470913 AYA KAU_COAV-16301 2014-05-02 00:00:00 2014-05-02 BK