Alternate namesHelmer, Anomaly 2, C. Helmer Property
RegionNA
Data scoreC
Coordinates44.65579, -104.09059
References
Nash, A.L., 1955, Airborne reconnaissance of eastern flank of the Black Hills, South Dakota, U.S. Atomic Energy Commission Report RME-1061, 16 p. [note that this publication is in the USGS library restricted section].CONSV. DIV. COMP. DATE, 12-15-1961