Thesis (PH. D)--University of Pennsylvania, 1937. / Includes bibliographical references (p. 42-51).
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/297894462 |
| Date | January 1939 |
| Creators | Estill, Adelaide Duncan, |
| Publisher | Philadelphia : [s.n.], |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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