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3. Intercomparison of Radionuclide Measurements in Marine Sediment Sample IAEA-135;Ballestra,1993
4. Intercomparison of Radionuclide Measurements on Marine Sediment Sample IAEA-300;Ballestra,1994
5. Report on the Intercomparison Run IAEA-0315 Radionuclides in Marine Sediment;Ballestra,1996