Cup-stones.

Rau, C. In Contributions to North American Ethnology, vol. 5, 1882. (U. S. Geog. and Geol. Survey of the Rocky Mountain Region.)

Fountain, G. H. The Antiquarian, 1897, p. 272. 1897.

Laubach, C. American Archæologist, 1898, p. 185. 1898.

Ivey, H. J. American Archæologist, 1898, p. 46. 1898.

Stilwell, L. W. American Archæologist, 1898 p. 51. 1898.

Discs.

Holmes, W. H. Report of the Bureau of Ethnology, 2, pp. 267 ff. 1880–81.

Snyder, J. F. The Archæologist, 1893, p. 181. 1893.

Moorehead. American Archæologist, 1898, p. 39. 1898.