TY  - BOOK
CN  - S21
CN  - S21
CY  - Washington, DC :
DA  - [1991]
ID  - 137014
KW  - Agriculture
KW  - Agricultural conservation
KW  - Agricultural ecology
KW  - Sustainable agriculture
KW  - Agriculture
KW  - Environment
N1  - Shipping list no.: 91-819-P.
PB  - [U.S. Dept. of Agriculture] :
PB  - For sale by the Supt. of Docs., U.S. G.P.O.,
PP  - Washington, DC :
PY  - [1991]
SN  - 0160341442
T1  - Agriculture and the environment.
TI  - Agriculture and the environment.
ER  -