TY  - BOOK
AU  - Gilbeart H. Collings
TI  - Commercial fertilizers : Their sources and use. Ed 4
U1  - 631.8 
PY  - 1947///
CY  - Philadelphia
PB  - Blakiston Co
N1  - Gilbeart H. Collings: Commercial fertilizers : Their sources and use. Ed 4.  (4th Ed)  Philadelphia.  Blakiston Co, 1947.--(631.8COL)
ER  -