TY  - BOOK
AU  - Martin, John H
AU  - Leonard, Warren H
AU  - Stamp, David 
TI  - Principles of field crop production
SN  -  0023767200
U1  - 633.00973 
PY  - 1976///
CY  - New York: 
PB  - Macmillan Publishing Co.
KW  - Agriculture and related technologies
KW  - Technology (Applied sciences)
KW  - Field crops
ER  -