THE LANCE FORMATION - PETROGRAPHY AND STRATIGRAPHY, POWDER RIVER BASIN AND NEARBY BASINS, WYOMING AND MONTANA; GEOLOGICAL SURVEY BULLETIN 1917-I
Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1992. Hardcover. Seventeen pages with phtographs, maps and references. All eight large folded plates and maps are present in the rear pocket. Short mended tear to the rear cover. A near fine copy. More