Soen, Oen Ing. “Hornblendic Rocks and Their Polymetamorphic Derivatives in an Area NW. Of Ivigtut, South Greenland”. Meddelelser om Grønland 169, no. 6 (June 19, 1962): 1–84. Accessed February 28, 2026. https://tidsskrift.dk/meddrgroenland/article/view/160428.