Attitudes of undergraduate special education majors toward mentally retarded children and change in these attitudes as a result of an introductory course in special education : a thesis in special education, 190 - 01 - 04 - LD1017 .C8133 1973 B6, Volume: Archives LD1017 .C8133 1973 B6; Volume: Carlson Library Level A Main Quarto Collection LB1084 .B6. Clarion University Archives.

Attitudes of undergraduate special education majors toward mentally retarded children and change in these attitudes as a result of an introductory course in special education : a thesis in special education, 190 - 01 - 04 - LD1017 .C8133 1973 B6, Volume: Archives LD1017 .C8133 1973 B6; Volume: Carlson Library Level A Main Quarto Collection LB1084 .B6. Clarion University Archives. http://as-clarion.klnpa.org/repositories/2/resources/309 Accessed December 16, 2025.