1. Anderson, B., 1989. Oilfield radiation risk cited. Baton Rouge State Times. 19 January, 7B.
2. Anon, 1990. Study of produced water in the state of Louisiana, State of Louisiana. Baton Rouge.
3. API (American Petroleum Institute), 1991. Produced water radionuclides hazard/risk assessment, Phase 1. API 1220 L Street, NW Washington, DC.
4. Bassignani, A., Di Luise, G., Fenzi, A., Finazzi, P.B., 1991. Radioactive scales in Oil and Gas production centres. Soc. Petrol Engng. 23380.
5. BAZ, 1989. Bundesminister der Justiz Bekanntmachung der Dosisfaktoren Bundesanzeinger, 41, No. 185 a, BMJ.