References
^ Ian Thornton, Gerrit H. Vonkeman, Michael J. Scoullos, Zen MakuchMercury - Cadmium - Lead : Handbook for Sustainable Heavy Metals Policy and Regulation 31 by Zen Makuch, Michael J. Scoullos, Gerrit H. Vonkeman and Ian Thornton (2001, Hardcover) ISBN 9781402002243 (revised Feb 2015)^ Scoullos, Michael J. (2014). Mercury - Cadmium - Lead : Handbook for Sustainable Heavy Metals Policy and Regulation, SPRINGER. BiggerBooks. ISBN 9781402002243 (revised Feb 2024)
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