Robert E. Peary. The Discovery of the North Pole (for further references on both sea and pack ice and Antarctic shelf ice, consult Hobbs’s Characteristics of Existing Glaciers, pp. 210-213, 242-244).
Icebergs:—
Wyville Thomson. Challenger Report, Narrative, vol. 1, 1865, Pt. i, pp. 431-432, pls. B-D.
I. C. Russell. An Expedition to Mt. St. Elias, Nat. Geogr. Mag., vol. 3, 1891, pp. 101-102, fig. 1.
H. F. Reid. Studies of Muir Glacier, Alaska, ibid., vol. 4, 1892, pp. 47-48.
E. von Drygalski. Grönland-Expedition, etc., vol. 1, pp. 367-404.
M. C. Engell. Ueber die Entstehung der Eisberge, Zeit. f. Gletscherk., vol. 5, 1910, pp. 112-132.