TY - JOUR A1 - Gupta, P. A1 - Christopher, S. A. T1 - Seven year particulate matter air quality assessment from surface and satellite measurements JO - Atmos. Chem. Phys. J1 - ACP VL - 8 IS - 12 SP - 3311 EP - 3324 Y1 - 2008/06/27 PB - Copernicus Publications SN - 1680-7324 UR - http://www.atmos-chem-phys.net/8/3311/2008/ L1 - http://www.atmos-chem-phys.net/8/3311/2008/acp-8-3311-2008.pdf DO - 10.5194/acp-8-3311-2008 ER -