TY  - BOOK
AU  - Harland,Jack R.
TI  - Crops & man
SN  - 089118032X
PY  - 1975///
CY  - Madison, Wis.
PB  - American Society of Agronomy
KW  - Plants, Cultivated
KW  - History
KW  - Agriculture
N1  - Includes index; Bibliography : p. 271-286
ER  -