(København), 1951. Large8vo. In contemporary half cloth with gilt stamp and lettering to front board. Offprint from ""Geografisk Tidsskrift"", vol. 51. Stamp to title-page. Fine and clean. Pp. 94-133.
First appearance on Jacobsen's paper on the topographical, hydrographical and Meteorological challenges in navigating in the Arctic.
Kbh., 1964. 350 pp. samt kortmappe med 29 plancher. (Disp.).