Size-Resolved Source Apportionment of Airborne Particle Mass in a Roadside Environment Riddle, Sarah G. ; Robert, Michael A. ; Jakober, Chris A. ; Hannigan, Michael P. ; Kleeman, Michael J. Abstract Publication: Environmental Science and Technology Pub Date: September 2008 DOI: 10.1021/es702827h Bibcode: 2008EnST...42.6580R