TY  - BOOK
AU  - Hughes Harold D
AU  -  Metcalfe Darrel S
TI  - Crop production
U1  - J:5, L2 
PY  - 1972///
CY  - New York    
PB  -  Macmillan        
KW  -  Plant production
KW  - Agriculture
N1  - Includes bibliographies
ER  -