@Article{acp-8-3311-2008, AUTHOR = {Gupta, P. and Christopher, S. A.}, TITLE = {Seven year particulate matter air quality assessment from surface and satellite measurements}, JOURNAL = {Atmospheric Chemistry and Physics}, VOLUME = {8}, YEAR = {2008}, NUMBER = {12}, PAGES = {3311--3324}, URL = {http://www.atmos-chem-phys.net/8/3311/2008/}, DOI = {10.5194/acp-8-3311-2008} }