H. Hess. Die Gletscher, Braunschweig, 1904, pp. 426 (illustrated).

William H. Hobbs. Characteristics of Existing Glaciers. Macmillan, 1911, pp. 301, pls. 34.

Special districts of mountain glaciers:—

James D. Forbes. Travels Through the Alps of Savoy and other Parts of the Pennine Chain with Observations on the Phenomena of Glaciers. Edinburgh, 1845, pp. 456, pls. 9, maps 2.

A. Penck, E. Brückner, et L. du Pasquier. Le système glaciare des alpes, etc., Bull. Soc. Sc. Nat. Neuchâtel, vol. 22, 1894, pp. 86.

E. Richter. Die Gletscher der Ostalpen. Stuttgart, 1888, pp. 306, 7 maps.

James D. Forbes. Norway and Its Glaciers, etc. Edinburgh, 1853, pp. 349, pls. 10, map.

I. C. Russell. Existing Glaciers of the United States, 5th Ann. Rept. U. S. Geol. Surv., 1885, pp. 307-355, pls. 32-55; Glaciers of Mt. Ranier, 18th Ann. Rept. U. S. Geol. Surv., 1898, pp. 349-423, pls. 65-82.

W. H. Sherzer. Glaciers of the Canadian Rockies and Selkirks, Smith. Cont. to Knowl. No. 1692, Washington, 1907, pp. 135, pls. 42.

H. F. Reid. Studies of Muir Glacier, Alaska, Nat. Geogr. Mag., vol. 4, 1892, pp. 19-84, pls. 1-16.