SP-52 Messages in Stone: Colorado's Colorful Geology (2nd Edition) SP-52 Messages in Stone: Colorado’s Colorful Geology (2nd Edition)
OF-05-03 Geologic Map of the Southern Half of the Culebra Peak Quadrangle OF-05-03 Geologic Map of the Southern Half of the Culebra Peak Quadrangle, Costilla and Las Animas Counties, Colorado
OF-04-08 Geological Map of the La Valley Quadrangle OF-04-08 Geological Map of the La Valley Quadrangle, Costilla County, Colorado
OF-03-14 History OF-03-14 History, Geology and Environmental Setting of Selected Mines in the Upper Alamosa River Basin, Rio Grande National Forest, Conejos and Rio Grande Counties, Colorado
OF-03-15 Geologic map of the Taylor Ranch Quadrangle OF-03-15 Geologic map of the Taylor Ranch Quadrangle, Costilla County, Colorado
OF-02-06 Geologic Map of the Fort Garland SW Quadrangle OF-02-06 Geologic Map of the Fort Garland SW Quadrangle, Costilla County, Colorado