[1]
A. Kingery-Schwartz, R. S. Popelka-Filcoff, D. A. Lopez, F. Pottier, P. Hill, and M. Glascock, “Analysis of geological ochre: its geochemistry, use, and exchange in the US Northern Great Plains”, Open J Archaeometry, vol. 1, no. 1, p. e15, Dec. 2013.