1. American Society for Testing and Materials, 1983, Standard classification system for uranium resources, Designation: E901-82: American Society for Testing and Materials, 1916 Race St., Philadelphia, PA 19103 USA, Reprint from the Annual Book of ASTM Standards, 13 p.
2. Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p.
3. Finch, W.I., 1991, Maps showing the distribution of uranium deposits in the Colorado Plateau uranium province—A cluster analysis: U.S. Geological Survey Miscellaneous Field Studies Map MF-2080, scale 1:2,500,000.
4. Finch, W.I., Grundy, W.D., and Pierson, C.T., 1990a, Geologic/geographic clusters for statistical sampling of sandstone-type uranium deposits for grade-tonnage and other modelling,in International Workshop on Statistical Prediction of Mineral Resources Preprint Series: China University of Geosciences, Wuhan, China, Preprint, v. III, p. 1–7.
5. Finch, W.I., Sutphin, H.B., Pierson, C.T., McCammon, R.B., and Wenrich, K.J., 1990b, The 1987 estimate of undiscovered uranium endowment in solution-collapse breccia pipes in the Grand Canyon region of northern Arizona and adjacent Utah. U.S. Geological Survey Circular 1051, 19 p.