1. F. Kayser and M. Cohen:Metal Progr., 1952, vol. 61, p. 79.
2. W. B. Pearson:A Handbook of Latrice Spacings and Structure of Metals and Alloys, vol. 1, Pergamon Press, New York, 1958.
3. K. Kuo:J. Iron Steel Inst., 1953, vol. 173, p. 363.
4. K. Kuo:J. Iron Steel Inst., 1953, vol. 174, p. 223.
5. J. E. Bridge, Jr., G.N. Maniar, and T. V. Philip:Microstructure Changes on Austenitizing and Tempering of M-50 High Speed Steel. Carpenter Technology Corporation, Reading, Pa., unpublished research, 1970.