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Report title; "Robert E. Benton, Superintendent." - T.p.
Report title; "Robert E. Benton, Superintendent." - T.p.;
Report title
Maps; Two folded maps laid in; Cover title: Crater Lake National Park, Oregon; Includes bibliographical references (p. 26-7)
ill., maps; Includes bibliographical references
1 map; Report title; Includes bibliographical references