TY  - BOOK
AU  - Gilbeart H. Collings
TI  - Commercial fertilizers : Their source and use. Ed 4
U1  - 631.8 
PY  - 2002///
CY  - Delhi
PB  - Biotech Books
N1  - Gilbeart H. Collings: Commercial fertilizers : Their source and use. Ed 4.  Delhi.  Biotech Books, 2002.--(631.8COL)
ER  -