Academic diss.--University of Helsinki, 1991.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/463649616 |
| Date | January 1991 |
| Creators | Bruun, Christer. |
| Publisher | Helsinki : The Finnish society of sciences and letters, |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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