TY  - BOOK
AU  - Darrel S. Metcalfe
AU  -  Donald M. Elkins, 
TI  - Crop production : Principles and practices. Ed 4
SN  - 0-02-380710-5
U1  - 633 
PY  - 1980///
CY  - New York
PB  - McMillan Publishing Company Inc
N1  - Darrel S. Metcalfe & Donald M. Elkins: Crop production : Principles and practices. Ed 4.  (4th Ed)  New York.  McMillan Publishing Company Inc, 1980. 0-02-380710-5--(633MET)
ER  -