Essential portion of Thesis--University of Pennsylvania.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/575902345 |
| Date | January 1948 |
| Creators | Lewis, Edwin Henderson. |
| Publisher | Philadelphia, Univ. of Pennsylvania. |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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