TY  - BOOK
ED  - United States
TI  - Soil
T2  - Its Yearbook of agriculture
AV  - S21 .A35 1957
PY  - 1957///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Soils
KW  - Local
KW  - United States
KW  - Soil conservation
N1  - Limited to the management of soil; Includes index
ER  -