Edward J. Plaster - <br/><br/>
Soil Science & Management /  the process of creating symbols that endure  
Jack Gernsheimer. 
 - 5th ed. 
 - Delmar Cengage Learning,  Allworth Press  ©2009 
<br/><br/><label>ISBN: </label>9781418038656  RM 691.8 
<br/><br/><label>Dewey Class. No.: </label>631.4/PLA