Hogrefe, O., Schwab, J., Drewnick, F., Lala, G. G., Peters, S., Demerjian, K. L., Rhoads, K., Felton, H. D., Rattigan, O.,
Husain, L., & Dutkiewicz, V. (2004). Semicontinuous PM2.5 Sulfate and Nitrate Measurements
at an Urban and a Rural Location in New York: PMTACS-NY Summer 2001 and 2002 Campaigns. Journal of
the Air and Waste Management Association, 54, 1040-1060.