TY  - BOOK
AU  - Collings,Gilbeart H., x
AU  - x
TI  - Commerical fertilizers: Their sources and use
SN  - x
U1  - 631.8/COC 
PY  - 1962///
CY  - Bombay
PB  - Tata McGraw - Hill
KW  - Fertilizers and Manures
N1  - x
ER  -