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93922 
Technical Report 
Changes in forest health and productivity in the United States and Canada 
Barnard, JE; Lucier, AA; Brooks, RT; Dunn, PH; Johnson, AH; Karnosky, DF 
1991 
National Acid Precipitation Assessment Program 
Washington, DC 
16 
is part of a larger document 077981 Acidic deposition: State of science and technology. Vols I-IV
Acidic deposition: State of science and technology