Keller, Edward A, <br/><br/>
Environmental geology  Textual Documents 
Edward A Keller 
 - 2nd ed. 
 - Ohio  Charles E.Merrill Publishing Company  1976 
 - xii, 548p.:  26cm. 
<br/><br/><label>ISBN: </label>0675082964 
<br/><br/><label>Subjects--Index Terms: </label>Environmental 
<br/><br/><label>Dewey Class. No.: </label>551