title: Winter motor-vehicle emissions in Yellowstone National Park.
authors: Department of Chemistry and Biochemistry, University of Denver, CO 80208, USA. gbishop@du.edu
authors: Gary A
authors: GA
authors: Bishop
authors: Daniel A
authors: DA
authors: Burgard
authors: Thomas R
authors: TR
authors: Dalton
authors: Donald H
authors: DH
authors: Stedman
authors: John D
authors: JD
authors: Ray