1. Cameron, D. E. (1944). Amer. J. Psychiat., 101, 36.
2. Progressive Relaxation;Holmes, T.H.; Wolff, H.G.;Psychosomat. Med,1952
3. Malmo, R. B., and Shagass, C. (1949a). Psychosomat. Med., 11, 9.
4. Malmo, R. B., and Shagass, C. (1949b). Ibid., 11, 25.
5. Headache;Wolff, H.G.,1948