TY  - BOOK
AU  - Martin,John H
AU  - Leonard,Warren H
AU  - Stamp,David L.jtauthor
TI  - Principles of field crop production
SN  - 0023767200
PY  - 1976///
CY  - New York
PB  - Macmillan
KW  - Field crops
KW  - United States
N1  - Includes bibliographies and index; Open access
ER  -