1. Davis, Mackenzie L. and David A Cornwell. Introduction to Environmental Engineering 2^nded . McGraw-Hill, Inc: 1991, New York. pp.437-439.

2. De Nevers, Noel. Air Pollution Control Engineering. McGraw-Hill, Inc: 1995, New York. pp.331-360, 372-373,394-396.

3. Erbes, Russell E. Air Quality Compliance. 2^nded. John Wiley & Sons, Inc: 1996, New York.

4. Internet resources:

http://wwwga.usgs.gov/edu/acidrain.html

http://btdqs.usgs.gov/acidrain/arfs.htm

http://www.epa.gov/ardpublc/acidrain/effects/diagram.html

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