Abstracts of recent published materials on soil and water conservati on.
Abstracts of recent published materials on soil and water conservati on.
- New York : U.S. Department of Agriculture, 1967-
- v. : ill. ; 25 cm.
- Irregular intervals
U.S Government
Soil and Water Conservation.
PER 631.45 U5
U.S Government
Soil and Water Conservation.
PER 631.45 U5