TY  - BOOK
AU  - Collings, Gilbert H.
TI  - Commercial fertilizers
U1  - 631.8 COL 
PY  - 1941///
CY  - Philadelphia
PB  - The Blakiston
KW  - Fertilizer industry
KW  - Soil fertility
KW  - Agricultural chemistry
N1  - Includes index
ER  -