Fristrup., Børge. “Geological Map of the Arctic. Prepared by the First International Symposium on Arctic Geology 1960. Sponsored by The Alberta Society of Petroleum Geologists, Calgary. 40" X 45". $ 4,50.”. Geografisk Tidsskrift 61 (januar 1, 1962). Set februar 28, 2021. https://tidsskrift.dk/geografisktidsskrift/article/view/46728.