Harpstead, Milo I.,  1930- <br/><br/>
Soil science simplified / 
Milo I. Harpstead, Francis D. Hole, William Bennett ; illustrated by Mary Bratz-Stephens. 
 - 2nd ed. 
 - Ames :  Iowa State University Press,  1988. 
 - vii, 196 p. :  ill. 
<br/><br/><label>ISBN: </label>0813815142 
<br/><br/><label>LCCN: </label>90025153 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil science.