Upton B. The geology of Tugtutôq and neighbouring islands, South Greenland. Part III. Olivine gabbros, syeno-gabbros and anorthosites. Part IV. The nepheline syenites of the Hviddal composite dyke. bullggu [Internet]. 1964 Dec. 30 [cited 2024 Jul. 3];48:1-80. Available from: https://geusjournals.org/index.php/bullggu/article/view/6582