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by:
Ervasti, Esko
(1921-1977)
In: Kaltio. - ISSN 0355-4511. - Oulu. - 17 (1961) : 7, s. 123-124
Journal article
In: Kaltio. - ISSN 0355-4511. - Oulu. - 17 (1961) : 7, s. 123-124
Journal article