“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, vol. 48, pp. 1–80, Dec. 1964, doi: 10.34194/bullggu.v48.6582.