TY  - BOOK
AU  - Ayanaba, A.,ed.
TI  - Biological nitrogen fixation in farming systems of the tropics
U1  - 581.133.11:631.1(669) 1975.10 (082.2) L7 
PY  - 1977///
CY  - Chichester
PB  - John Wiley & Sons
KW  - Dart, P.J., jt. ed.
KW  - Edited by A.Ayanaba and P.J.Dart.
KW  - Nitrogen fixation,Farming systems
ER  -