Keller, Edward A., 1942- <br/><br/>
Environment geology 
Edward A. Keller 
 - 6th ed. 
 - New York  MacMillan  1992 
 - 521 p. : ill. ; 29 cm. 
<br/><br/><label>LCCN: </label>91-024084 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental geology