1. Technical Papers, SPI Regional Technical Conference, July 14-15, (1965).
2. ASTM, D-1344-57, American Society of Testing Materials.
3. Composite Materials, Elsevier Publishing Company, (1966), p. 1.
4. Particulate Technology, The Macmillan Company, (1966), p. 409.
5. Composite Material, edited by Holliday, Elsevier Publishing Company, (1966), p. 38.