Air pollutants effects on forest ecosystems :  papers presented at the Symposium : Effects of Air Pollutants on Forest Ecosystems, May 8-9, 1985, St. Paul, MN / 
major sponsors, the National Acid Precipitation Assessment Program [and] Environment Canada, Ottawa ; coordinated by the Acid Rain Foundation. 
 - St. Paul, MN :  The Foundation,  [c1985] 
 - 439 p., [1] leaf of plates :  ill. 
<br/><br/> Cover title. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants, Effect of air pollution on.<br/>Forest ecology.<br/>Plants, Effect of acid deposition on.
<br/><br/><label>LC Class. No.: </label>SB745  / .A37 1985 
<br/><br/><label>Dewey Class. No.: </label>581.5/2642�19