Occurrence and persistence of perfluorooctanesulfonate and other perfluorinated surfactants in groundwater at a fire-training area at Wurtsmith Air Force Base, Michigan, USAElectronic supplementary information (ESI) available: Map of location of Wurtsmith Air Force Base, Oscoda, MI and surrounding states. See http://www.rsc.org/suppdata/em/b2/b212497a/
Distribution of the number of citations over years.