In a letter to Thomas Gates in 1969 as a member of the President's Commission on the All Volunteer Force.
Crawford Greenewalt: Cytaty po angielsku
In Chemical and Engineering News, November 10, 1952, as quoted by Alan Tower Waterman in Research for National Defense, in the Bulletin of the Atomic Scientists (March 1953), Vol. 9, No. 2,ISSN 0096-3402, published by Educational Foundation for Nuclear Science, Inc., p. 39.