Plný text je přístupný pouze z počítačů Ostravské univerzity
Electronic reproduction. [Place of publication not identified] : HathiTrust Digital Library, 2010.
Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. http://purl.oclc.org/DLF/benchrepro0212
Issued by: Division of Educational Statistics, Bureau of Educational Research and Development, Office of Education, 1962-1963; Department of Health, Education, and Welfare, Office of Education, 1964; by the Bureau of Educational Research and Development and the National Center for Educational Statistics, 1965; by the National Center for Educational Statistics, Office of Education, 1966-1973; by the National Center for Education Statistics, 1974.
Description based on: 1962; title from PDF title page (ERIC, viewed Mar. 2, 2018).
Latest issue consulted: 1974 (ERIC, viewed Mar. 2, 2018).