TY  - BOOK
AU  - Harold D. Hughes
AU  -  Edwin R. Henson, 
TI  - Crop production : Principles and practices
U1  - 633 
PY  - 1957///
CY  - New york
PB  - Macmillan Company
N1  - Harold D. Hughes & Edwin R. Henson: Crop production : Principles and practices.  New york.  Macmillan Company, 1957.--(633HUG)
ER  -