Necklaces.
Kroeber, A. L. Bulletin of the American Museum of Natural History, vol. 18, no. 4, p. 440. Arapaho. 1907.
Neolithic Implements.
Note. American Antiquarian, vol. 2, p. 177. 1880.
Cresson, H. T. The Archæologist, vol. 2, p. 163. 1894.
Net-Sinkers.
West, G. A. Wisconsin Archeologist, vol. 7, pp. 131 ff. 1908.
Obsidian.
McGee, W. J. American Anthropologist, vol. 2, p. 301. Nevada. 1889.
McGuire, J. D. American Anthropologist, vol. 5, p. 169. Manufacture. 1892.