Ruhe, Robert V.,  1918- <br/><br/>
Landscape evolution and soil formation in southwestern Iowa / 
Robert V. Ruhe, Raymond B. Daniels, and John G. Cady. 
 - Washington :  U.S. Dept. of Agriculture,  1967 
 - 242 p. :  ill., maps ;  23 cm. 
<br/><br/>Bibliography: p. 225-231. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil formation--Iowa<br/>Geomorphology--Iowa
<br/><br/><label>Dewey Class. No.: </label>631.47