TY  - GEN
AU  - Ayaaba A, Dart P J
TI  - Biological nitrogen fixation in farming systems of the tropoics
SN  - 0471994995
U1  - 631.  460  913 AYA 
CY  - Chichester, John Wiley & Sons
KW  - Nitrogen fixation/farming-tropics-nitrogen fixation-congresses/agriculture-tropics-congresses
ER  -