Kimbrough D, Chin R, Wakakuwa J (1992)
Industry-wide performance in a pilot performance evaluation sample program for hazardous materials laboratories. 2. Precision and accuracy of polychlorinated biphenyls. Environ Sci Technol 26:2101-4. Abstract: http://pubs.acs.org/doi/abs/10.1021/es00035a004?journalCode=esthag