TY  - BOOK
AU  - Collings, Gilbeart H
TI  - Commercial fertilizers: their sources and use
U1  - 631.8 21st
PY  - 1947///
CY  - Philadelphia
PB  - Blakiston
KW  - Fertilizers; Fertilizer industry; Agricultural chemicals industry; Ammonia as fertilizer; Potassium fertilizer
ER  -