Book call no. Lawrence, KS, University Press of Kansas, 1993. Includes bibliographical references and index. Book call no. Novato, CA, Presidio Press, 1988.
Book call no.
B846s Brown, Anthony Cave. New York, Macmillan, 1987. Vannevar Bush, Ultra and the Other Memex . Metuchen, NJ, Scarecrow Press, 1994. B959i Codebreaking and Signals Intelligence .