00755cam a22002291i 4500 hew62000083 DLC 20260227111511.0 790502s1962 dcu f000 0 eng hew62000083 (OCoLC)4921103 DLC NjWP OCoLC DLC premarc Z5811 .U437 United States. Office of Education. Research projects of the Cooperative Research Program ; a five-year summary, July 1, 1956-Sept., 30, 1961. [Washington : The Office, 1962] iv, 79 p. ; 26 cm. "OE-12015." Education Research Bibliography. United States. Office of Education. Cooperative Research Program. 34357 34357