Title: Crater Lake Nat'l. Park, Ore.
Authors: Gerdine, T. G. 1872-1930.; Marshall, Robert Bradford, 1867-1949.; Chapman, Pearson.; Biggs, L. F.; Kerr, Mark B.; Geological Survey (U.S.)
Publisher: The Survey,
Year: 1931
Subjects: National parks and reserves Oregon Maps.; Crater Lake National Park (Or.) Maps.