1. U.S., Canadian researchers explore Arctic Ocean;Aagaard;EOS, Trans. Am. Geophys. Union,1996
2. Aarkrog, A., 1995. RISØ National Laboratory, Roskilde, Denmark. Private communication.
3. Sources of anthropogenic radionuclides in the southern Urals;Aarkrog;J. Environ. Radioact.,1992
4. Amundsen, I., Oughton, D., 1997. In: Amundsen, Oughton (Eds.), Sources Contributing to Radioactive Contamination of the Techa River and Areas Surrounding the “Mayak” Production Association, Urals, Russia. Norwegian Radiation Protection Authority, Østerås, Norway, 134 pp.
5. ANSI, 1987. American National Standard Calibration Techniques for the Calorimetric Assay of Plutonium-bearing Solids Applied top Nuclear Materials Control. ANSI N15.22-1987. American Standards Institute.