TY  - BOOK
AU  - Rao, N.S. Subba
AU  - Venkataraman, G.S.Kannaiyan, S.Wadhwani, A.M.
TI  - Biological nitrogen fixation  
PY  - 1993///
CY  - New Delhi
PB  - Indian Council of Agricultural Research
KW  - Nitrogen
ER  -