TY  - BOOK
AU  - Harrar, Jacob George,
TI  - Principles for progress in world agricultutre
U1  - P 630 H37 
PY  - 1966///
CY  - New York
PB  - Rockfeller Foundation
KW  - Agriculture
N1  - "Presented at the 33rd annual meeting of the National Agricultural C hemicals Association, White Sulphur Springs, West irginia"
ER  -