BÜTLER, Heinrich. Report on the work of Heinrich Bütler in the years 1933-34, 1936, and 1938. Meddelelser om Grønland, [S. l.], v. 143, n. 2, p. 405–438, 1955. Disponível em: https://tidsskrift.dk/meddrgroenland/article/view/165966. Acesso em: 28 feb. 2026.