%0 Journal Article %A Agnes B Lobscheid %A Thomas E McKone %B Atmospheric Environment %D 2004 %G eng %P 5501-5515 %T Constraining uncertainties about the sources and magnitude of polycyclic aromatic hydrocarbon (PAH)levels in ambient air: the State of Minnesota as a case study %V 38 %1 7.2 %2 LBNL-54473