TY  - BOOK
AU  - H COLLINGS
TI  - COMMERCIAL FERTILIZERS
U1  - GN 631.8 C692C5 
PY  - 1955///
CY  - LONDON
PB  - McGRAW-HILL BOOK COMPANY
KW  - COMMERCIAL FERTILIZERS
N1  - MODERN BOOK HOUSE JBP
ER  -