1. A. K. Burnham andS. B. Brown, Advertisement for Low-Density Material in Chemical and Engineering News (Target Fabrication Technical Memo, Lawrence Livermore National Laboratory, 18 September, 1984).
2. S. T. Benton andC. R. Schmitt,Carbon 10 (1972) 185.
3. H. C. Geer, in ?Encyclopedia of Polymer Science and Technology?, edited by H. F. Mark, N. G. Gaylord, and N. M. Bikales (Interscience, New York, 1970) p. 102.
4. Morton Salt Product Data Sheet (Morton Thiokol Inc., Chicago, 1983).
5. G. M. Jenkins andK. Kawamura, ?Polymeric Carbons-Carbon Fibre, Glass and Char? (Cambridge University Press, New York, 1976) p. 22.