@article {12620, title = {Source Apportionment Methods Applied to the Determination of the Origin of Ambient Aerosols that affect Visibility in Forested Areas}, journal = {Atmospheric Environment}, volume = {18}, year = {1984}, pages = {261-272}, keywords = {Aerosol monitoring, Air pollution, Environmental Studies}, doi = {10.1016/0004-6981(84)90099-4}, author = {Stevens, Robert K. and Dzubay, Thomas G. and Lewis, Charles W. and Shaw, Robert W.} }