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Williams, R., A. Kaufman, AND S. Garvey. CAIRPOL CAIRCLIP NM-VOC. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/115 (NTIS PB2015-104894), 2015.

Williams, R., A. Kaufman, AND S. Garvey. CAIRPOL CAIRCLIP O3-NO2. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/117 (NTIS PB2015-105134), 2015.

WILLIAMS, R. W., T. M. BARZYK, AND A. KAUFMAN. Citizen Science Air Monitor (CSAM) Quality Assurance Guidelines. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/008, 2015.

Mukerjee, S., L. Smith, H. Brantley, C. Stallings, L. Neas, Sue Kimbrough, AND R. Williams. Comparison of modeled traffic exposure zones using on-road air pollution measurements. Atmospheric Pollution Research. Turkish National Committee for Air Pollution Research and Control, Izmir, Turkey, 6(1):82-87, (2015).

Williams, R., A. Kaufman, AND S. Garvey. DYLOS DC110. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/116 (NTIS PB2015-104895), 2015.

Williams, R. Emerging Low-Cost Sensors for Various Applications (Next Generation Air Monitoring). Federal Data Working Group, McLean , VA, McLean, VA, October 19, 2015.

Williams, R., A. Kaufman, T. Hanley, J. Rice, AND S. Garvey. Evaluation of Elm and Speck Sensors. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/314, 2015.

Kaufman, A., R. Williams, S. Hunt, R. French, H. Wilson, G. Hagler, Vasu Kilaru, P. Fine, S. Katz, G. Robarge, AND D. Renwick. Highlights from the Air Sensors 2014 Workshop. EM: AIR AND WASTE MANAGEMENT ASSOCIATION'S MAGAZINE FOR ENVIRONMENTAL MANAGERS. Air & Waste Management Association, Pittsburgh, PA, , 34-39, (2015).

Williams, R., A. Kaufman, AND S. Garvey. MET ONE 831. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/114 (NTIS PB2015-104893), 2015.

Williams, R., A. Kaufman, AND S. Garvey. Next Generation Air Monitoring (NGAM) VOC Sensor Evaluation Report. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/122 (NTIS PB2015-105133), 2015.

Williams, R., A. Kaufman, AND S. Garvey. PERKINELMER ELM. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/125 (NTIS PB2015-105136), 2015.

Thomas, K., J. Xue, R. Williams, P. Jones, AND D. Whitaker. Polychlorinated biphenyl sources, environmental levels, and exposures in school buildings. ISES 2015 Annual Meeting, Henderson, NV, October 18 - 22, 2015.

Conner, T., L. Cernikovsky, J. Novak, AND R. Williams. Source apportionment with uncertainty estimates of PM2.5 in Ostrava, Czech Republic using Positive Matrix Factorization. 2015 European Aerosol Conference, Milan, ITALY, September 10, 2015.

Williams, R., A. Kaufman, AND S. Garvey. TOXIRAE PRO PID. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/124 (NTIS PB2015-105135), 2015.

Kaufman, A., R. Williams, T. Barzyk, M. OShea, A. Hoang, P. Sheridan, AND M. Greenberg. The Air Sensor Citizen Science Toolbox: A Collaboration in Community Air Quality Monitoring and Mapping. Citizen Science 2015 Conference, San Jose, CA, February 11 - 12, 2015.

Williams, R., A. Kaufman, AND S. Garvey. UNITEC SENS-IT. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/119 (NTIS PB2015-105132), 2015.

Williams, R., D. Costa, A. Brown, A. Kaufman, D. Buchbinder, G. Hagler, E. Thoma, Bill Mitchell, B. Gullett, W. Jiao, Vasu Kilaru, R. Long, M. Beaver, R. Duvall, P. Solomon, K. Leovic, E. Smith, L. Stanek, Tim Watkins, P. Preuss, S. Katz, G. Robarge, E. Snyder, B. Sharpe, AND S. Garvey. #2) Sensor Technology-State of the Science. Webinar Presentation - Sensor Technology-State of the Science, Research Triangle Park, NC, July 08, 2014.

Williams, R., Vasu Kilaru, E. Snyder, A. Kaufman, T. Dye, A. Rutter, A. Russell, AND H. Hafner. Air Sensor Guidebook. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-14/159 (NTIS PB2015-100610), 2014.

Hammond, D., C. Croghan, H. Shin, R. Burnette, R. Bard, R. Brook, AND R. Williams. Cardiovascular impacts and micro-environmental exposure factors associated with continuous personal PM2.5 monitoring. Journal of Exposure Science and Environmental Epidemiology . Nature Publishing Group, London, Uk, 24(4):337-345, (2014).

Kaufman, A., R. Williams, T. Barzyk, AND Tim Watkins. Citizen Science and Emerging Technologies. Presented at US Public Health Service Scientific and Training Symposium, Raleigh, NC, June 10 - 12, 2014.

Williams, R., A. Kaufman, T. Hanley, J. Rice, AND S. Garvey. Evaluation of Field-deployed Low Cost PM Sensors. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-14/464 (NTIS PB 2015-102104), 2014.

Thomas, K., J. Xue, R. Williams, Paul-A Jones, AND D. Whitaker. Exposure Modeling for Polychlorinated Biphenyls in School Buildings. 8th International PCB Workshop, Woods Hole, MA, October 05 - 09, 2014.

Breen, M., T. Long, Brad Schultz, J. Crooks, M. Breen, J. Langstaff, K. Isaacs, C. Tan, R. Williams, Y. Cao, A. Geller, R. Devlin, S. Batterman, AND T. Buckley. GPS-based Microenvironment Tracker (MicroTrac) Model to Estimate Time-Location of Individuals for Air Pollution Exposure Assessments: Model Evaluation in Central North Carolina. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, 24(4):412-420, (2014).

Tulve, N., K. Isaacs, R. Williams, T. McCurdy, L. Phillips, C. Croghan, AND H. Ozkaynak. How Questionnaires and Multimedia Measurements collected in the U.S. EPA’s Observational Human Exposure Measurement Studies Inform Exposures. ISES 2014 Annual Meeting, Cincinnati, OH, October 12 - 16, 2014.

Williams, R. ISES Training Class - Continuous Measurements. 2014 International Society of Exposure Science, Cincinnati, OH, October 12 - 16, 2014.