Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1912. Hardcover. Bulletin 485] Geologic Reconnaissance of Iliamna region, Alaska; 486] Results of Spirit Leveling in Colorado, 1869-1910; 487] Results of Spirit Leveling in Idaho, 1896-1909; 488] Results of Spirit Leveling in Nevada, 1897-1909; 489] Results of Spirit Leveling in Utah, 1897-1910;..... More