TY  - BOOK
AU  - Collings, Gilbert H
TI  - Commercial fertilizers: their sources and use
U1  - 631.8 
PY  - 1955///
CY  - New york
PB  - Mcgraw-Hill Book Company
KW  - Sodium Nitrate
KW  - Liquid  Fertilizers
KW  - Origin and development
KW  - Principles underlying the purchase of fertilizers
KW  - Potash
ER  -