Knudsen J. The Dutch Discovery and Mapping- of Spitsbergen (1596—1829.) Edited by order of the Nelherland Minister of Foreign Affairs. By Dr. F. C. Wieder. Published by the Netherland Ministry of Foreign Affairs and the Royal Dutch Geographical Society. Amsterdam 1919. (124 S. Tekst med 45 Tavler, stor 4° Format). gt [Internet]. 1. januar 1920 [henvist 15. januar 2025];25. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/47107