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3. General Electric Corp., Multihundred Watt Radioisotope Thermoelectric Generator Program, Doc. No. GEMS-419, Vol. 1, Philadelphia, PA, 1975.
4. R.W. Douglas, A. Krier and R.I. Jaffee, Battelle Memorial Institute Report NP-10939, Aug. 1961.
5. S.P. Lynch, Metal Science, 15 (1981), pp. 463–467.