TY  - BOOK
AU  - Martin,John H  .
AU  - Leonard,Warren H  .
AU  - Stamp,David L  .
TI  - Principles of field crop production / 
SN  - 0021767200
U1  - 633 
PY  - 1976///
CY  - New york : 
PB  - Macmillan , 
KW  - FIELD-CROPS-UNITED STATES
N1  - Include index
ER  -