TY  - BOOK
AU  - Delorit,Richard J.
AU  - Ahlgren,Henry Lawrence
TI  - Crop production
T2  - Prentice-Hall vocational agriculture series
AV  - SB185 .D43 1967
U1  - 633 
PY  - 1959///
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Field crops
ER  -