19. Crater Lake National Park, “Ranger-Naturalists Temporary Manual of Operation,” 1934, Library Collection, Crater Lake National Park.
20. Annual Report, Crater Lake National Park, 1935, RG 79, Central Files, 1933-49, File No. 207-001.4, Part One, Crater Lake, Reports (General), Superintendent’s Annual Report.
21. Annual Report, Crater Lake National Park, 1936, RG 79, Central Files, 1933-49, File No. 207-001.4, Part One, Crater Lake, Reports (General), Superintendent’s Annual Report; “Research Problems Carried on by the Ranger Naturalist Staff, 1935,” Old Naturalist Files, Crater Lake National Park; and “Check-List of Birds of Crater Lake National Park,” December 1937, Vertical Files, Klamath County Library, Klamath Falls, Oregon.
22. “Exhibit Layout Plan For Interior Exhibit Room, Sinnott Memorial, Crater Lake National Park,” by Ansel F. Hall, Field Division of Education, Berkeley, California, April 6, 1937, RG 79, Western Region (IV), Central Classified Files, 1923-42, Box 28, Folder 833-05, Crater Lake National Park, Sinnott Memorial Museum, 1931-37, FRC, San Bruno.
23. Annual Report, Crater Lake National Park, 1937, RG 79, Central Files, 1933-49, File No. 207-001.4, Part One, Crater Lake, Reports (General), Superintendent’s Annual Report. Also see Report of Educational Activities in Crater Lake National Park, Oregon Caves National Monument, and Lava Beds National Monument for the Year ending June 30, 1937, RG 79, Central Files, 1933-49, File No. 840, Part 1, Crater Lake, Educational Activities and Methods (General).
24. “Outline of Research Activities in Crater Lake National Park, Lava Beds National Monument, Oregon Caves National Monument,” December 1937, Old Naturalist Files, Crater Lake National Park, and Annual Report, Crater Lake National Park, 1938, RG 79, Central Files, 1933-49, File No. 207-001.4, Part One, Crater Lake, Reports (General), Superintendents Annual Report.
25. Annual Report, Crater Lake National Park, 1939, RG 79, Central Files, 1933-49, File No. 207-001.4, Part One, Crater Lake, Reports (General), Superintendents Annual Report.
26. Annual Report, Crater Lake National Park, 1940, RG 79, Central Files, 1933-49, File No. 207-001.4, Part One, Crater Lake, Reports (General), Superintendent’s Annual Report. Also see Leavitt to Cressman, December 6, 1939 (and enclosures), RG 79, Central Files, 1933-49, File No. 840, Part 1, Crater Lake, Educational Activities and Methods (General), and Doris Payne, “Human Values in Nature as Represented at Crater Lake” [Reprinted from The Living Wilderness, October 1943], National Park Service Historical Collection, Harpers Ferry Center.
27. Annual Report of the Director of the National Park Service, 1940, in Annual Report of the Secretary of the Interior, 1940, p. 210, and Annual Report of the Director of the National Park Service, 1941, in Annual Report of the Secretary of the Interior, 1941, pp. 324-25.
28. Crater Lake National Park, Development Outline, Scientific Research and Interpretation, February 18, 1944, RG 79, Region IV, Central Classified Files, Crater Lake, Box 11, Folder 600.01, Part I, Master Plans, FRC, San Bruno. Also see “Objectives of National Parks With Special Reference to Educational Influence,” August 15, 1944, RG 79, Central Files, 1933-49, File No. 871, Crater Lake National Park, Associations, Clubs and Committees.
29. Annual Report, Crater Lake National Park, 1943, RG 79, Central Files, 1933-49, File No. 207-001.4, Superintendent’s Annual Report, and First Annual School for Ranger-Naturalists Combined with Civilian Defense Training, Crater Lake National Park, 1942, RG 79, Central Files, 1933-49, File No. 840, Part 1, Crater Lake, Educational Activities and Methods (General).
30. Thomson to Director, National Park Service, December 17, 1923, and Cammerer to Thomson, December 22, 1923, RG 79, Central Files, 1907-39, File No. 201-011, Part 1, Advisory Council.
31. Annual Report of the Executive Secretary, Crater Lake Natural History Association, January 28, 1947, RG 79, 67A612, Box 3, File 0-09, FRC, Seattle.
