by:
Harjumaa, Pentti
(1934- )
In: Sever. - ISSN 0131-6222. - Petrozavodsk. - 1999 : 3, s. 82-90
Journal article
In: Sever. - ISSN 0131-6222. - Petrozavodsk. - 1999 : 3, s. 82-90
Journal article