References
Wilson, F.H., and Shew, N., 1981, Map and tables showing preliminary results of potassium-argon age studies in the Circle Quadrangle, Alaska, with a compilation of earlier dating work: U.S. Geological Survey Open-File Report 81-889, 1 sheet, scale 1:250,000.Foster, H.L., Laird J., Keith T.E.C., Cushing, G.W., and Menzie, W.D., 1983, Preliminary geologic map of the Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-170-A, 1 sheet, scale 1:250,000.Menzie, W.D., Foster, H.L., Tripp, R.B., and Yeend, W.E., 1983, Mineral resource assessment of the Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-170-B, 61 p., 1 sheet, 1:250,000.Dahlin, D.C., Brown, L.L., and Warner J.D., 1987, Characterization of Ketchem Dome tin prospect, east-central Alaska: U.S. Bureau of Mines Report of Investigation 9145, 11 p.Nokleberg, W.J., Bundtzen, T.K., Berg, H.C., Brew, D.A., Grybeck, D.J., Robinson, M.S., Smith, T.E., and Yeend, W., 1987, Significant metalliferous lode deposits and placer districts of Alaska: U.S. Geological Survey Bulletin 1786, 104 p.Wilkinson, K., 1987, Geology of a subarctic, tin-bearing batholith, Circle Hot Springs, Alaska: Fairbanks, Alaska, University of Alaska, Mineral Industry Research Laboratory Report 74, 70 p.