Olfert Voss No description specified. 1-4 (4 Records) Documents Danish experiments with furnaces with slag pit (1973) Jernproduktion i Denmark perioden 0-550 e. Kr. (1991) Jernudvinding i Danmark i forhistorik tid [with English summary: prehistoric iron smelting in Denmark] (1962) Jernudvindingsanlæg i Danmark fra forhistorisk og historisk tid (1986)