The Security Clearance Hearing . Ithaca : Cornell University . ISBN 0-8014-3783-0 .. Smith, Alice Kimball; Weiner, Charles (1980). Robert Oppenheimer: Letters and recollections . Cambridge : Harvard University Press .. [ edit ]Further reading Thorpe, Charles. Oppenheimer: The Tragic Intellect (University Of Chicago Press, 2006) ISBN 0-226-79845-3 Cassidy, David C.