TY  - BOOK
TI  - Soil the 1957 yearbook of agriculture
T2  - Its Yearbook of Agriculture
U1  - 631.82 
PY  - 1957///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Soils
KW  - Soil conservation
N1  - Limited to the management of soil
ER  -