B-41 Bibliography and Index of Publications Related to Coal in Colorado: 1972-1977 B-41 Bibliography and Index of Publications Related to Coal in Colorado: 1972-1977
OF-14-07 Geologic Map of the Watkins SE Quadrangle OF-14-07 Geologic Map of the Watkins SE Quadrangle, Arapahoe and Elbert Counties, Colorado
OF-14-01 Geologic Map of the Cabin Gulch Quadrangle OF-14-01 Geologic Map of the Cabin Gulch Quadrangle, Elbert County, Colorado