Notes on the geological map of Canning Land (East Greenland) /
Bütler, Heinrich.
Geologisk ekspedition til Ostgronland, 1936-38.
Kobenhavn : C. A. Reitzels Forlag,
1948.
At head of title: Geologisk expedition til Ostgronland 1936-38, under ledelse af Lauge Koch.
"Literature": p. 94-97.
Geology