TY  - GEN
AU  - Cox, Joseph F
AU  - Jackson, Lyman E
TI  - Crops : a self teaching course, based on crop management and soil conservation
T2  - 826
U1  - 633 COX 
CY  - NewYork, John Wiley & Sons INC
KW  - Crop production-soil fertility/soil erosion/weed control-crop production
ER  -