APA

Dept. of Geology and Mineral Industries, O., Kulm, 1., Scheidegger, K., Byrne, 1., Spigai, J., Pattullo, J., Burt, W., & Burdwell, G. (1968). The Ore Bin ; Vol. 30 No. 9 (September 1968). : Oregon. Dept. of Geology and Mineral Industries.