TY  - BOOK
AU  - Kohnke, Helmut
AU  - Bertrand, Anson R.
TI  - Soil conservation
U1  - 631.45 
PY  - 1959///
CY  - London
PB  - McGraw-Hill Book Company
KW  - Soil conservation.
KW  - United States
N1  - Includes index
ER  -