1. J.C. Johnson, J.M. Van Emon, Development and evaluation of a quantitative enzyme linked immunosorbent assay (ELISA) for polychlorinated biphenyls, EPA Report EPA/600/R-94/112, 1994, pp. 9–11
2. Quantitative enzyme-linked immunosorbent assay for determination of polychlorinated biphenyls in environmental soil and sediment samples;Johnson;Anal. Chem.,1996
3. J.C. Chuang, P.J. Callahan, C.W. Lyu, M.R. Pennybacker, Characterization of polycyclic aromatic hydrocarbon exposure among children of low income families from inner city and rural areas, Final Report (Year 2) to US EPA, Cooperative Agreement CR 822073, October 1995
4. ASTM, Standard practice for collection of floor dust from carpeted floors for chemical analysis, D 5438-93, Annual Book of ASTM Standards, vol. 11.03, American Society for Testing and Materials, Philadelphia, PA, 1994, pp. 570–576
5. US Environmental Protection Agency, Method 3540A – Soxhlet Extraction, Manual SW-846, US Environmental Protection Agency, Office of Solid Waste and Emergency Response, Washington, DC, 1990a