Proctor D, Panko J, Liebig E, Mundt K, Buczynski M, Barnhart R, Harris MA, Morgan R, Finley B, Paustenbach D. 2003. Workplace concentrations of airborne hexavalent chromium for the Painesville, Ohio chromate production plant. Appl Occup Environ Hyg 18(6):430-449; doi: 10.1080/10473220301421.