TY  - BOOK
AU  - Williams, W. R.
AU  - Jacks, G. V.
TI  - Principles of Agriculture
U1  - 630 
PY  - 1952///
CY  - New York
PB  - Chemical Publishing Co., Inc.
KW  - Agriculture and related technologies
KW  - Technology (Applied sciences)
KW  - Agriculture
ER  -