[51] Gesell, Arnold: Mental Hygiene and the Public School. Mental Hygiene, January, 1919.

[52] Campbell, C. Macfie: The Responsibilities of the Universities in Promoting Mental Hygiene. Mental Hygiene, April, 1919.

[53] Cobb, Stanley: Applications of Psychiatry to Industrial Hygiene. The Journal of Industrial Hygiene, November, 1919.

[54] Ibid.

[55] Southard, Elmer E.: Notes and Comments. Mental Hygiene. January, 1921.

[56] Tuke, D. Hack: A Dictionary of Psychological Medicine. 1892.

[57] Tuke, D. Hack: A Dictionary of Psychological Medicine. 1892.

[58] Clouston, T. S.: Unsoundness of Mind. 1911.

[59] Morgagni, G. B.: De Sedibus et Causis Morborum per Anatomem Indegatis. 1761.

[60] Journal of Mental Science. January, 1870.