Keller, Edward A.,  1942- <br/><br/>
Environmental geology 
Edward A. Keller, with assistance from E.M. Burt 
 - 2nd ed 
 - Columbus  London  Merrill  c1979 
 - xii, 548p, [20]p of plates  ill.(some col.), maps  26cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>550  / .8