Keller, Edward A., 1942- <br/><br/>
Environmental geology 
Edward A. Keller with assistance from E.M. Burt 
 - 3rd ed 
 - Columbus  Merrill  1982 
 - xii, 526 p.,  8  leaves of plates ill. (some col.) 27 cm 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>LCCN: </label>81-81407 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology<br/>Environmental protection