21. Mineralogical maps showing the distribution of ore-related minerals in the minus-30-mesh, nonmagnetic heavy-mineral fraction of stream sediment, Healy quadrangle, Alaska Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
22. Summary and interpretive geochemical maps of West Virginia Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by U.S. Geological Survey Map Distribution Resource Type: Map Access & Availability: Loading