N. S. Shaler. The Conditions of Erosion beneath Deep Glaciers, based upon a Study of the Bowlder Train from Iron Hill, Cumberland, Rhode Island, Bull. Mus. Comp. Zoöl. Harv. Coll., vol. 16, No. 11, 1893, pp. 185-225, pls. 1-4 and map.
William H. Hobbs. The Diamond Field of the Great Lakes, Jour. Geol., vol. 7, 1899, pp. 375-388, pls. 2 (also Rept. Smithson. Inst., 1901, pp. 359-366, pls. 1-3).
Glacial features:—
T. C. Chamberlin. Preliminary Paper on the Terminal Moraine of the Second Glacial Epoch, 3d Ann. Rept. U. S. Geol. Surv., 1883, pp. 291-402, pls. 26-35.
G. H. Stone. Glacial Gravels of Maine and their Associated Deposits, Mon. 34, U. S. Geol. Surv., 1899, pp. 489, pls. 52.
W. C. Alden. The Delaven Lobe of the Lake Michigan Glacier of the Wisconsin Stage of Glaciation and Associated Phenomena. Prof. Pap. No. 34, U. S. Geol. Surv., 1904, pp. 106, pls. 15; The Drumlins of Southeastern Wisconsin, Bull. 273, U. S. Geol. Surv., 1905, pp. 46, pls. 9.
W. M. Davis. Structure and Origin of Glacial Sand Plains, Bull. Geol. Soc. Am., vol. 1, 1890, pp. 196-202, pl. 3; The Subglacial Origin of Certain Eskers, Proc. Bost. Soc. Nat. Hist., vol. 35, 1892, pp. 477-499.
F. P. Gulliver. The Newtonville Sand Plain, Jour. Geol., vol. 1, 1893, pp. 803-812.