Dasmann, R. F.  1919- <br/><br/>
Planet in peril :  man and the biosphere today, 
R. F. Dasmann. 
 - Harmondsworth :  Penguin,  1972. 
 - 135 p. :  ill. ;  18 cm. 
 - Penguin education .
<br/><br/>p. 133-135. 
<br/><br/><label>ISBN: </label>0140807152 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Ecology<br/> Man--Influence on nature<br/> Nature conservation