Keller, Edward A , <br/><br/>
Environmental geology  Textual Documents 
Edward A Keller 
 - 4th ed. 
 - Delhi  CBS Publishers & Distributors  1985 
 - xii, 480p.:  26cm. 
<br/><br/><label>Subjects--Index Terms: </label>Environmental geology 
<br/><br/><label>Dewey Class. No.: </label>551