Figure 1. (Color online) Map of study area showing sampling sites within El Paso County (bold outline)

From

Cerium Levels in Coarse and Fine Airborne Particulate Matter in El Paso, Texas, U.S.A.

Fumador E.A., Amaya M.A., Brunner B., Clague J.W., Li W-W., Olvera H.A., Berwick M., Burchiel S.W., Pingitore N.E.

Journal of Atmospheric Pollution. 2019, 7(1), 1-13 doi:10.12691/jap-7-1-1