Environmental challenges    A global survey 

 - Delhi  U D H       1985 
 - xi,335p  cm. 
<br/><br/><label>Standard No.: </label>8,391 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BIOLOGY
<br/><br/><label>Dewey Class. No.: </label>G:55.1:g, M5