CHROMITE DEPOSITS OF BOULDER RIVER AREA, SWEETGRASS COUNTY, MONTANA: GEOLOGICAL SURVEY BULLETIN 948-C
Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1949. Soft cover. Pages 63 through 82. The required six maps are in the rear pocket. Bound in the standard origianl gray stiff paper with printing in black. A very good copy. More