Army Regulations, Government Printing Office, 615-26, 1942, p. 653.
2.
Boring, E. G. (editor). Psychology for the Armed Services. Washington: Infantry Journal, 1945, p.,241 .
3.
Ibid.
4.
Staff, Personnel Research Section, Classification and Enlisted Replacement Training Branch, The Adjutant General's Office. "Personnel Research in the Army. 11. The Classification System and the Place of Testing." Psychological Bulletin, XL ( 1943 ), 205- 211 .