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2. Annual Report of Radioactive Discharges and Monitoring of the Environment;B.N.F.L.,1978
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4. The distribution of some fission product radionuclides in sea and estuarine sediments;Hetherington;Neth. J. Sea Res.,1974
5. Environmental and public health consequences of the controlled disposal of transuranic elements to the marine environment;Hetherington,1976