Keller, Edward A., 1942- <br/><br/>
Environmental geology 
Edward A. Keller 
 - 4th ed 
 - Columbus  Charles E. Murrill  1985 
 - 480p. ill. 28cm 
<br/><br/><label>LCCN: </label>84-62584 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology<br/>Environmental protection