Thesis (Ph. D.)--Columbia University, 1924. / Vita. Published also as Teachers college, Columbia university. Contributions to education, no. 148.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/607752757 |
| Date | January 1924 |
| Creators | Ruggles, Allen Mead, |
| Publisher | New York, Teachers college, Columbia University, |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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