prepared for the City of Idaho Springs by Stephen D. Schwochow.
Includes 2 plates: Plate 1. Geology, metallic mineral resources and mines in the Idaho Springs vicinity, Colorado. 1:6000 -- Plate 2. Gravel resources in the Idaho Springs vicinity, Colorado. 1:12000.
Plate 1 has an index of "Mines listed by quadrants."
Bibliography: pages 7-9.
Print version record.