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Norway | |
| Geological Survey of Norway (NGU). The Ore Database (Malmdatabasen). Deposit Area 814 - 010. Rørholt |
| Burvald, Ingulv (2018) Trachenbergk Bergwerck, Kongens seigerhytte og Traag Mines Ltd. i Bamble, og Mynten i Skien. Telemark 1542-1908. Et renessansebergverk i Bamble og dets historie fra fødsel til grav. Norsk Industri forlag. p.1-316. |
| Røsholt, B. (1967): The lead and zinc bearing veins at Tråk in southern Norway. Norges Geologiske Undersøkelse. 250B, 33-64 |
| Røsholt, B. (1967): The lead and zinc bearing veins at Tråk in southern Norway. Norges Geologiske Undersøkelse. 250B, 33-64 |
| Røsholt, B. (1967): The lead and zinc bearing veins at Tråk in southern Norway. Norges Geologiske Undersøkelse. 250B, 33-64 |
| Røsholt, B. (1967): The lead and zinc bearing veins at Tråk in southern Norway. Norges Geologiske Undersøkelse. 250B, 33-64 |
| Røsholt, B. (1967): The lead and zinc bearing veins at Tråk in southern Norway. Norges Geologiske Undersøkelse 250B, 33-64 |
| Røsholt, B. (1967): The lead and zinc bearing veins at Tråk in southern Norway. Norges Geologiske Undersøkelse. 250B, 33-64 |
| Røsholt, B. (1967): The lead and zinc bearing veins at Tråk in southern Norway. Norges Geologiske Undersøkelse. 250B, 33-64 |
| Røsholt, B. (1967): The lead and zinc bearing veins at Tråk in southern Norway. Norges Geologiske Undersøkelse. 250B, 33-64 |