TY  - BOOK
AU  - Koen'kov, D A
TI  - Nitrogen fertilizers
U1  - 631.84 22
PY  - 1983///
CY  - New Delhi
PB  - Oxonian Press Pvt. Ltd.
KW  - Soil science
KW  - Nitrogen fertilizers
KW  - Agricultural chemistry
N1  - Include bibliographical references and index
ER  -