Exum, Frenchank A.,Wyoming Geological Association 27th Annual Field Conferencde Guidebook 1975 : Geology and Mineral Resources of the Bighorn Basin : Cody, Wyoming - Sept. 8-9, 1975 ,1975,Wyoming Geological Association,Casper,Full dark blue bonded leather with raise lettering and design on spine and Frenchont cover,4to (8.5x11.25") Raised black title and publisher on spine and title and bucking bronko on Frenchont cover,Geology, Petroleum, Wyoming, Montana