The Determinants of Income for Primary and Secondary Laborers

Thurow L. , Poverty and Discrimination, copyright 1969 by Brookings Institute, Washington, D.C.

Piore M. , “Manpower Policy,” in Beer S. H. Barringer R. E. , editors, The State and the Poor; copyright by Winthrop, 1970 Cambridge, Mass.

Braverman H. , Labor and Monopoly Capital, copyright 1974, by the author. Monthly Review, New York.