TY  - BOOK
AU  - Symposium on Nitrogen Assimilation and Crop Productivity, Hissar, Oct. 5-7, 1976.
AU  - Sen, S. P. ; ed.
TI  - Nitrogen assimilation and productivity; proceedings
U1  - 338.163184 
PY  - 1978///
CY  - New Delhi
PB  - Associated Publishing House
ER  -