J. Robert Oppenheimer's letter to his brother Frank Oppenheimer (October 14, 1929), as quoted in "Robert Oppenheimer: Letters and Recollections" edited by Alice Kimball Smith (p. 136), 1995.
J. Robert Oppenheimer's letter to his brother Frank Oppenheimer (October 14, 1929), as quoted in "Robert Oppenheimer: Letters and Recollections" edited by Alice Kimball Smith (p. 135), 1995.