| Reference | Ellersieck, I.F., Curtis, I.M., Gruzensky, A.L., Mayfield, C.F., and Tailleur, I.L., 1980, Copper, lead and zinc in stream-sediment samples from the DeLong Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-795, 3 sheets, scale 1:250,000. |