GriegerR. M.RichardsH. S.Prevalence and structure of behavior symptoms among children in special education and regular classroom settings. Journal of School Psychology, 1976, 14 (1), 27–38.
2.
Hobson v. Hanson. 269 F. Supp. 401 (D.D.C. 1967).
3.
HollingsheadA. B.Two-factor index of social position. Unpublished manuscript, 1957.