1. The molecular basis of visual excitation;Wald;Am. Scientis,1954
2. Size, shape, and contrast in detection of targets by daylight. I. Data and analytical description;Lamar;J. Optical Soc. Am.,1947
3. Night vision in ground combat;Neel;U. S. Army Combat Forces J.,1952
4. Strughold, H.: The human time factor in flight: II. Chains of latencies in vision. USAF School of Aviation Medicine. Unnumbered project, Nov., 1950, pp. 9, J. Aviation Med., 22:100–108 (April) 1951.
5. Strughold, H.: The human time factor in flight: I. The latent period of optical perception and its significance in high-speed flying. USAF School of Aviation Medicine, Unnumbered project, Jan., 1951, pp. 7.