TY  - BOOK
AU  - Harold D. Hughes
AU  -  Darrel S. Metcalfe, 
TI  - Crop production. Ed 3
U1  - 633 
PY  - 1972///
CY  - New york
PB  - The Macmillan Company
N1  - Harold D. Hughes & Darrel S. Metcalfe: Crop production. Ed 3.  (3rd Ed)  New york.  The Macmillan Company, 1972.--(633HUG)
ER  -