TY  - GEN
AU  - Collings , Gilbeart H.
TI  - Commercial fertilizers
U1  - 631.8 
PY  - 1962///
CY  - Bombay
PB  - TATA Mcgraw-hill Publishing Com.Ltd.
KW  - FERTILIZERS
KW  - AGRICULTURE
KW  - NUTRITION
ER  -