Thesis (M.S.P.H.)--University of Michigan, 1939.
Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/604495563 |
Date | January 1939 |
Creators | Hoffman, Erwin F. |
Source Sets | OCLC |
Language | English |
Detected Language | English |
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