Air pollution's toll on forests and crops / 
edited by James J. MacKenzie and Mohamed T. El-Hasry 
 - New Haven, Conn. :  Yale University Press,  1989 
 - 376 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0300052324  RM57.86 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trees--Effect of air pollution on--United States<br/>Trees--Effect of air pollution on--Europe<br/>Crops--Effect of air pollution on--United States<br/>Crops--Effect of air pollution on--Europe