Thesis (Ed. D.)--University of Pennsylvania. / Bibliographical references: p. 250-251.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/300945976 |
| Date | January 1930 |
| Creators | Roberts, Mary Elma. |
| Publisher | Philadelphia, Pa. : University of Pennsylvania, |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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