TY  - BOOK
AU  - Ayanaba, A,
TI  - Biological Nitrogen Fixation in Farming Systems of the Tropics
SN  - 0471994995
U1  - 589.7041 
PY  - 1977///
CY  - New York
PB  - John Wiley & Sons
KW  - Biological Nitrogen Fixation
ER  -