TY  - BOOK
AU  - Collings, Gilbeart H.
TI  - Commercial fertilizers/by Gilbeart H. Collings
U1  - 631.8  
PY  - 1955///
CY  - Bombay: 
PB  - Tata McGraw-Hill Publishing, 
KW  - Agriculture and related technologies
KW  - Technology (Applied sciences)
KW  - Fertilizers
ER  -