Diss. -- Helsingin yliopisto.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/644594763 |
| Date | January 1946 |
| Creators | Valli, Erkki. |
| Publisher | Helsinki : Suomalainen tiedeakatemia, |
| Source Sets | OCLC |
| Language | German |
| Detected Language | German |
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