1. Institution of Water Engineers: Evidence submitted to the Central Advisory Water Committee,1970
2. World Health Organisation: International Standards for Drinking-Water,1963
3. Chemical Carcinogenesis and Cancers;Hueper,1964
4. Silent Spring;Carson,1969
5. C.D. Reed, J.A. Tolley, Vitalstoffe (6/67, 6/68, and 4 & 5/69).