TY  - BOOK
AU  - Sen,S P .
AU  - Abrol,Y P  .
AU  - Sinha,S K  .
TI  - Nitrogen assimilation and crop productivity / 
U1  - 572.54 
PY  - 1978///
CY  - New Delhi : 
PB  - Associated Publishing , 
KW  - BIOCHEMISTRY
N1  - Includes index
ER  -