1. Lithologic, age group, magnetopolarity, and geochemical maps of the Springerville volcanic field, east-central Arizona Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : Information Services [distributor] Resource Type: Map Access & Availability: Loading
2. 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