Walton, B. J. “Sanerutian Appinitic Rocks and Gardar Dykes and Diatremes, North of Narssarssuaq, South Greenland”. Meddelelser om Grønland 179, no. 9 (July 15, 1965): 70 pp. Accessed February 28, 2026. https://tidsskrift.dk/meddrgroenland/article/view/155280.