TY - GEN AU - Lewandowski,Michael AU - Jaoui,Mohammed AU - Offenberg,John H AU - Kleindienst,Tadeusz E AU - Edney,Edward O AU - Sheesley,Rebecca J AU - Schauer,James J TI - Primary and secondary contributions to ambient PM in the midwestern United States SN - 0013-936X PY - 2008///0922 KW - Air Pollutants KW - analysis KW - Air Pollution KW - Carbon KW - Environmental Monitoring KW - methods KW - Gas Chromatography-Mass Spectrometry KW - Midwestern United States KW - Models, Statistical KW - Models, Theoretical KW - Organic Chemicals KW - Particle Size KW - Particulate Matter KW - Seasons KW - Time Factors N1 - Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S UR - https://doi.org/10.1021/es0720412 ER -