Author:Per Martin Tvengsberg

Works

 * Gruen suomalaismetsan kaskiviljelysta II Kalevalaseuran vuosikirja 62, (1982)
 * Skogsfinnene pd Finnskogen: Viirmlandsfinnar (1986)
 * Swidden Cultivation, Tillage without Tools II Ago Kunnap edit. Minor Uralic Languages: Grammar and Lexis (1995)
 * [//no.wikisource.org/wiki/Svedjebruk Svedjebruk], 2010
 * Slash and burn, a translation of Svedjebruk (2013)
 * Forest Finns, a translation of Svedjebruk (2013)