1. Maps showing gravity and aeromagnetic anomalies in the Butte 1⁰ x 2⁰ quadrangle, Montana Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
2. Maps showing gravity and aeromagnetic anomalies in the Dillon 1⁰ x 2⁰ quadrangle, Idaho and Montana Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading