Vanguard Green, Constance McLaughlin and Lomask, Milton. Vanguard: A History. Washington, DC: Smithsonian Institution Press, 1971. A detailed look at the politic climate surrounding and history of the Vanguard program. Some chapters go into excruciating details on committees and names, but others provide an excellent reference. Appendices include a summary of Vanguard launches, and all launches relation to the International Geophysical Year. $35. Hagen, J.P. ``The Viking and the Vanguard.''Technology and Culture, 4, No. 4, Fall 1963, p. 42. Special edition containing many historical sketches. Martin Company. The Vanguard Satellite Launching Vehicle: An Engineering Summary. Engineering Report No. 11022, April 1960. Rosen, Milton. The Viking Rocket Story. New York: Harper, 1955. Out of print. Stehling, Kurt R. Project Vanguard. Garden City, New York: Doubleday, 1961. Out of print.