TY  - BOOK
AU  - BERTRAND,  Anson R
AU  - KOHNKE, Helmut
TI  - Soil conservation
T2  - McGraw Hill publication in the agricultural sciences
U1  - 631.459:631.61 
PY  - 1959///
CY  - New York
PB  - McGraw Hill
KW  - Soil conservation
ER  -