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2. (a)D. J. Klein , "Measurement of Crystallographic Thermal Expansion of Alpha Alumina and Beryllia to Elevated Temperatures Emphasizing Anistropic Effect ," NAA-SR-2542, U. S. Atomic Energy Commission Technical Information Service, Oak Ridge, Tenn., 1958 .
3. Thermal Expansion of Various Ceramic Materials to 1500oC