Purdom, Walton P. <br/><br/>
Environmental Science:  managing the environment /  [textbook] 
by Walton, P. Purdon and Stanley H. Anderson 
 - Ohio:  A Bell and Howell Company,  1980 
 - xi, 523 pages:  illustrations; 
<br/><br/>Includes bibliographical reference and index. 
<br/><br/><label>ISBN: </label>067508170x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Environmental protection
<br/><br/><label>LC Class. No.: </label>GF41  / PUR