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Norway | |
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| Nordrum, Fred Steinar (2008) Nyfunn av mineraler i Norge 2007-2008. STEIN. Magasin for populærgeologi, 35 (2) 8-20 |
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| Neumann, H. - Ed. (1960) International Geological Congress XXI Session Norden 1960 - Mineral occurrences in southern Norway. Guide to excursions no A.15 and no. C 12. p.1-18. |
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| Weibye, Paul Christian (1848) Beiträge zur topograpischen Mineralogie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde, 22. 465-544 |
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| Geological Survey of Norway (NGU). The Industrial Mineral Database. Deposit Area 815 - 331. Risøy |
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| Reitan, Paul H. (1959) Pegmatie veins and the surrounding rocks IV. Genesis of a discordant pegmatite, St. Hansholmen, Risør, Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 39 (2-3) 197-229 |
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| Uwe Kolitsch and Knut Edvard Larsen (visit to locality) and information from local collector and guide |
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| Evja, V. (2019) Mineraler fra Fikkjebakke industriområde, Sannidal, Kragerø, Telemark. Norsk Mineralsymposium: 82-85 |
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| Geological Survey of Norway (NGU). The Ore Database (Malmdatabasen). Deposit Area 815 - 025. Mørjeheia |
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| Larsen, Knut Edvard (2016) Noen funn av mineraler i Norge 2015-2016 [Some discoveries of minerals in Norway 2015-2016]. Norsk Mineralsymposium 2016, 127-135 |
Kragerø, Telemark, Norway