Ptarmigan

COBB, EDWARD H., 1975, TUNGSTEN OCCURRENCES IN ALASKA, USGS MAP, MR-66.CHAPIN, THEODORE, 1919, MINING IN THE FAIRBANKS DISTRICT: USGS BULL. 692, P 321-327.COBB, EDWARD H., 1972, METALLIC MINERAL RESOURCE MAP OF THE FAIRBANKS QUADRANGLE, ALASKA: USGS MISC. FIELD STUDIES MAP, MF-410.COBB, EDWARD H., 1976, SUMMARY OF REFERENCES TO MINERAL OCCURRENCES (OTHER THAN MINERAL FUELS AND CONSTRUCTION MATERIALS) IN THE FAIRBANKS QUADRANGLE, ALASKA: USGS OPEN FILE REPT. 76-662.