Air pollution effects on vegetation including forest ecosystems  proceedings of the second US-USSR symposium 
edited by Reginald D. Noble, Juri L. Martin, Keith F. Jensen. 
 - Bromall, PA  Northeastern Forest Experiment Station  [1989] 
 - 311 p.  ill.  26 cm. 
<br/><br/> Organized in connection with the 1972 US-USSR Environmental Protection Agreement and sponsored by the US Dept. of Agriculture Forest Service and the US Environmental Protection Agency.  "September 1989." 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>LCCN: </label>89603332  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants, Effect of air pollution on--Congresses.<br/>Forest ecology--Congresses.<br/>Trees--Effect of air pollution on--Congresses.
<br/><br/><label>LC Class. No.: </label>QK751  / .A38 1989 
<br/><br/><label>Dewey Class. No.: </label>581.5/222