1996 - General geology of the northern San Luis Valley, Colorado McCalpin, J.P., 1996, General geology of the northern San Luis Valley, Colorado, in Thompson, R.A., Hudson, M.R. and Pillmore, C.L. (eds.), Geologic Excursions to the Rocky Mountains and Beyond: Field Trip Guide for the 1996 Annual Meeting, Geological Society of America, Denver, CO, Oct. 28-31, Field Trip 20, Section II, Geology and Hydrogeology; CD-ROM, Special Publication 44, Colorado Geological Survey, Denver, CO, 11 p.
McCalpin, J.P., 1996, General geology of the northern San Luis Valley, Colorado, in Thompson, R.A., Hudson, M.R. and Pillmore, C.L. (eds.), Geologic Excursions to the Rocky Mountains and Beyond: Field Trip Guide for the 1996 Annual Meeting, Geological Society of America, Denver, CO, Oct. 28-31, Field Trip 20, Section II, Geology and Hydrogeology; CD-ROM, Special Publication 44, Colorado Geological Survey, Denver, CO, 11 p.