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by: Lappi-Seppälä, Heikki

Published: [Gloggnitz] : [Heikki Lappi-Seppälä], 2003.
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by: Seppälä, Heikki

Published: [Haukipudas] : [Heikki Seppälä], 2010 (Oulu : Ouluprint)
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by: Seppälä, Heikki.

In: Ketju. - ISSN 0355-2918. - 2016 : 1, s.48
Journal article
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by: Seppälä, Heikki.

In: Ketju. - ISSN 0355-2918. - 2016 : 3, s.40
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by: Seppälä, Heikki.

In: Ketju. - ISSN 0355-2918. - 2016 : 2, s.36
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by: Seppälä, Heikki.

In: Rantapohja. - ISSN 0358-478X. - Haukipudas : Rantapohja, 1969-. - 25.9.2001, s. 2
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by: Seppälä, Heikki.

In: Rantapohja. - ISSN 0358-478X. - Haukipudas : Rantapohja, 1969-. - 2.5.2008, s. 9
Journal article
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by: Seppälä, Heikki.

In: Rantapohja. - ISSN 0358-478X. - Haukipudas : Rantapohja, 1969-. - 16.11.2004, s. 12
Pohjolan työ. - Oulu : Pohjolan työ, 1937-. - ISSN 0782-5390. - 12.11.2004, s. 11
Journal article
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by: Seppälä, Heikki (1903- )

Published: Porvoo : WSOY, 1941.
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by: Seppälä, Heikki (1903- )

Published: Helsinki : Lehtipaino, 1944.
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by: Seppälä, Heikki (1903- )

Published: Helsinki : Kansankirja, 1947.
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by: Seppälä, Heikki (1903- )

Published: Helsinki : Kansankirja, 1945.
Book
no cover found
by: Seppälä, Heikki (1903- )

Published: Helsinki : Kansankirja, 1945.
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by: Seppälä, Heikki (1903- )

Published: Helsinki : Valistus, 1961.
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by: Seppälä, Heikki (1903- )

Published: Helsinki : Kansankirja, 1946.
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by: Seppälä, Heikki (1903- )

Published: Hämeenlinna : Karisto, 1928.
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no cover found
by: Seppälä, Heikki (1903- )

Published: Helsinki : Lehtipaino, 1944.
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