References
- 1979 . Federal Register , 44 ( 106 ) May 31 : 31513 Thursday
- Recently the Washington D.C. circuit court struck EPA's 50 ppm regulatory cut‐off and the current status of “PCB contamination”; is uncertain. The data obtained for this study can be reformatted to apply to any numerical definition of contamination.
- Cochran , W.G. 1977 . Sampling Techniques, , third edition , 89 – 111 . John Wiley & Sons .
- Gordon R.J., Szita, J., and Faeder, E.J. (unpublished method).