1. Achari, R., Sandhu, S. and Warren, W. (1975) Chlorinated hydrocarbon residues in groundwater,Bull. Environmental Contamination and Toxicology, 13, 4–16.
2. Ashley, D. (1969) Environmental factors in aetiology of gastric cancer,British J. of Preventive and Social Medicine, 23, 187–189.
3. Barnett, V. and Lewis, T. (1978)Outliers in Statistical Data. John Wiley & Sons, New York.
4. Bozzelli, J. and Kebbekus, B. (1979a) Analysis of selected volatile organic substances in ambient air, New Jersey Department of Environmental Protection (NJDEP), Trenton, N.J.
5. Bozzelli, J. and Kebbekus, B. (1979b) Lead and toxic metals in airborne particles, NJDEP, Trenton, N.J.