Dawes, Peter R. “The Proterozoic Thule Supergroup, Greenland and Canada: History, Lithostratigraphy and Development”. Geology of Greenland Survey Bulletin 174 (June 20, 1997): 1–150. Accessed November 27, 2024. https://geusjournals.org/index.php/ggub/article/view/6517.