ColemanJ. S.CampbellE. Q.HobsonC. J.McPartlandJ.MoodA. M.WeinseldF. D.YorkR. L.Equality of Educational Opportunity. Washington, D. C.: USGPO, 1966.
2.
CrothR. L.WhelanR. J.StablesJ. M.Teacher application of behavior principles in home and classroom environments. Focus on Exceptional Children, 1970, 1, 7.