Thesis (Ph. D.)--Columbia University, 1931. / Vita. Published also as Teachers College, Columbia University, Contributions to education, no. 461. Bibliography: p. 89-91. Also issued in print.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/297977671 |
| Date | January 1931 |
| Creators | Lepley, Ray, |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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