@misc{indiciae2aed6db49b18, title = {Geology of the Ralston Buttes district, Jefferson County, Colorado: a preliminary report}, author = {Douglas M. Sheridan and Charles H. Maxwell and Arden L. Albee and Richard Van Horn}, year = {1956}, doi = {10.3133/tem901}, url = {https://pubs.usgs.gov/publication/tem901}, note = {Source identifier: tem901} }