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2. 2L D Cohen"Level of aspiration behavior in certain psychosomatic disorders " Unpublished dissertation, Duke University, 1949 .
3. 3E. Fales, and C Anderson Genesis of level of aspiration in children from one and one-half to three years of age (Reported in1940 ).
4. Some Psychological Determinants of the Level of Aspiration
5. 5T M French, and F Alexander, Psychogenic factors in bronchial asthma. I and IIPsychosom Med Monogr#3 and#4, 1941 .