1- Majumdar & Madan – An Introduction to Social Anthropology, p.50
2- S.V. Ketkar, History of Caste in India, p.15
3- Gilbert, Fundamental of Sociology, Orient Longmans, Bombay, 1959, p.236
4- James Welton, Encyclopaedia Britanica, Art Education, vol.VIII, p.951
5- Durkheim, E. La Suicide, Passion, Paris, 1912.
6- Sorokin, P.A. Social and cutural mobility, The free Press Glencoe, 1927
7- Anderson, C.A.: A skeptical note on the relation of vertical mobility to education, American Journal of Socio-social Research, LXVI, 1961