TY  - BOOK
AU  - E. L Baum
AU  -  Earl. O Heady John. T Pesek  Clifford. G Hildreth
TI  - Economic and technical analysis of fertilizer innovations and resource use
U1  - 338.1718 
PY  - 1957///
CY  - Ames
PB  - Iowa State College Press
ER  -