Allen, John L .- <br/><br/>
Environment / 
John L. Allen. 
 - 21st ed. 
 - U.S.A :  McGraw-Hill publishers ,  c2002. 
 - xiv,225p.;  ill.drawings  27cm. 
<br/><br/> includes; bibliographical references and indexes 
<br/><br/><label>ISBN: </label>9780072506822 
<br/><br/><label>Subjects--Topical Terms: </label>--Environmental protection--Environmental sciences--Ecology--Pollution
<br/><br/><label>Dewey Class. No.: </label>500 ALL