1. N. F. Dow: Report No. R63SD61, General Electric, Space Sciences Laboratory, Philadelphia, Pa., August, 1963, also AD 414673, available through DDC, Alexandria, Va.
2. W. R. Tyson and G. J. Davies:Brit. J. Appl. Phys., 1965, vol. 16, p. 199.
3. B. W. Rosen:Fiber Composite Materials, p. 37, ASM, Metals Park, Ohio, 1965.
4. C. Edeleanu and T. J. Law:Phil. Mag., 1962, ser. 8, vol. 7, p. 573.
5. H. N. Hill and R. B. Mason:Metals and Alloys, 1942, p. 972.