Clark, R.E.: "The relation of schizophrenia to occupational income and occupational prestige." Amer. soc. Rev., 1948, 13, 325.
2.
Clark, R.E.: "Psychoses, income and occupational prestige." Amer. J. Sociol., 1949, 54, 44.
3.
Cooper, B.: "Psychiatric disorder in hospital and general practice." Soc. Psychiat., 1966, 1, 7.
4.
El-Islam, M.F.: "The psychotherapeutic basis of some Arab rituals." Int. J. Soc. Psychiat., 1967, XIII, 4, 265.
5.
Faris, R.E.L. and Dunham, H.W.: Mental Disorders in Urban Areas: An Aetiological Study of Schizophrenia and Other Psychoses. Chicago : University of Chicago Press, 1939.
6.
Goldberg, E.M. and Morrison, S.L.: "Schizophrenia and social class." Brit. J. Psychiat. , 1963, 109, 785.
7.
Hollingshead, A.B. and Redlich, F.C.: Social Class and Mental Illness. New York, 1958.
8.
Tietze, C., Lemkau, P. and Cooper, M.: "Schizophrenia, manic-depressive psychoses and social-economic factors ." Amer. J. Sociol., 1941, 47, 167.