TY  - BOOK
AU  - Collings, Gilbeart. H
TI  - Commercial Fertilizers: Their Sources and Use
SN  - 8176220655
U1  - 631.81 
PY  - 2002///
CY  - Delhi
PB  - Biotech Books
KW  - Agriculture and related technologies
KW  - Technology (Applied sciences)
KW  - Fertilizers
ER  -