Reference | COBB, E.H., MAYFIELD, C.F., AND BROSGE, W.P., 1981, SUMMARIES OF DATA ON AND LISTS OF REFERENCES TO METALLIC AND SELECTED NONMETALLIC MINERAL OCCURRENCES IN ELEVEN QUADRANGLES OF NORTHERN ALASKA; PART A, SUMMARIES OF DATA TO JANUARY 1, 1981: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 81-767A, 25 P |