Holmes, W. H. Report of the Bureau of Ethnology, 15, p. 105. 1893–94.

Minerals.

Rau, C. Report of the Smithsonian Institution, 1872–73. “Aboriginal Trade.” Copper, Galena, Obsidian, Mica, Slate, Flint, Pipestone, Shells, and Pearls.

Holmes, W. H. Report of the Bureau of Ethnology, 6, p. 35. Chiriqui. 1884–85.

Blake, W. W. American Antiquarian, 1887, pp. 164 ff. Aztecs. 1887.

Tassin, W. Report of the United States National Museum, 1897, 1, pp. 649–688 and 749–810. 1897. Lead, Iron, Copper, Silver, Crystals, etc. Agate, Cassiterite, Calcite, Chalcedony, Emery, Flint, Fluorite, Hornblende, Jadeite, Jasper, Nephrite, Pyrite, Quartz, Tin, Turquoise.

Brown, C. E. Wisconsin Archeologist, 1907, pp. 66 ff. 1907.

Mortars.

Holmes, W. H. American Anthropologist, 1899, p. 115. 1899.

Bourke, J. G. American Anthropologist, vol. 3, p. 61. South West. 1890.