Helfrich, Harold W. <br/><br/>
The Environmental Crisis  : Man's Struggle to live with Himself 

 - New Haven  : Yale University,  1970. 
 - x, 187p.  ; 20cm. 
<br/><br/><label>ISBN: </label>0-300-01312-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution<br/>Effect of nature on human beings<br/>Natural resources
<br/><br/><label>LC Class. No.: </label>TD176.7.E47