Clark, Ronnie <br/><br/>
Erosion condition classification system / 
Ronnie Clark 
 - Washington, D.C. :  United States Department of Interior,  1980 
 - 46 p. :  ill.;  28 cm. 
<br/><br/> cover title  filing code 7317 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Erosion--classification analysis
<br/><br/><label>Dewey Class. No.: </label>551.302