Simmons, I. G.  1937- <br/><br/>
Earth, Air and Water :  Resources and environment in the late 20th century / 
I.G. Simmons. 
 - vi, 254 p. :  ill., maps ; 
<br/><br/> includes index 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9780340524152 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology.<br/>Natural resources.<br/>Conservation of natural resources.
<br/><br/><label>LC Class. No.: </label>GF 41 SIM 1991