4Begab M J. The effect of differences in curricula and experiences on social work student attitudes and knowledge about mental retardation [ J ]. Dissertation Abstracts, 1969 (29) : 4111--4112.
5Krastner L S, et al. Assessing community attitudes to- ward mentally retarded person [J ]. American Journal of MentalDeficiency, 1979, 84 (2) : 137-- 144.