1. D. O. Graham,The Non-Nuclear Defense of Cities: The High-Frontier Space-Based Defense Against ICBM Attack, Abt Books, Cambridge, Mass. (1983).
2. Soviet Military Power 1985, Department of Defense (1985).
3. F. S. Hoffman, Study Director,Ballistic Missile Defenses and US National Security, Summary report for Future Security Strategy Study, Department of Defense (Oct. 1983).
4. For nonclassified accounts of the study see J. C. Fletcher, testimony before Subcommittee on R&D, Armed Services Committee, House of Representatives, 1 March 1984,
5. and J. C. Fletcher, “The Technologies for Ballistic Missile Defense,”Issues in Science and Technology1, No. 1 (Fall 1984), p. 15.