TY  - BOOK
AU  - Koren'kob,D.A., x
AU  - x
TI  - Nitrogen fertilizers: x
SN  - x
U1  - 631.84/K84m 
PY  - 1983///
CY  - New Delhi
PB  - Oxonian Press
KW  - Fertilizers and manures
N1  - x
ER  -