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2. “Boralloy” Data Sheet, High Temperature Materials, Inc., Lowell, Massachusetts (February 1965).
3. Guentert, O. J., and Mozzi, R. L., Nature, 193, 570 (1962).
4. JANAF Table for Boron Nitride.
5. Klein, C. A., Straub, W. D., and Diefendorf, R. J., Phys. Rev., 125, 468 (1962).