15 Patterson J.E. [n.d.]. Entomological report of the insect control project, Crater Lake National Park, Oregon, season spring 1929. 2 p. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
16 Godfrey Win. c. [n.d.]. Summary of work done on insect control project in Crater Lake National Park, season of 1929. 3 p. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
17 Brown, Lee P. [n.d.]. Report on Sand Creek beetle control project for season of 1929. crater National Forest. 10 p. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
18 Keen, F.P. Sept. 8, 1929. Report of the mountain pine beetle infestation in the lodgepole stands of crater Lake National Park, season of 1929. Alturas, CA: U.S. Bureau of Entomology. 7 p. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
19 Correspondence between Keen and Patterson for 1929. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
20 Patterson, J.E. [n.d.]. Memo for Supt. Crater Lake Park beetle control, spring of 1929. 2 p. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
21 Correspondence between Keen and Craighead in 1930. On file with Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
22 Correspondence Patterson to Keen. Dec. 1930. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
23 Medford Mail Tribune. Nov. 18, 1930.
24 Solinsky, Frank J. [n.d.]. Crater Lake National Park pine beetle control project for 1931. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
25 Forest Service newsletter, Pacific Northwest Forest and Range Experiment Station, Portland, Oregon, undated. Various Western Division newsletters, Forest Insect Investigations, Bureau of Entomology, Stanford University, California. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
26 Solinsky, E.C. [n.d.]. Preliminary report on beetle control Crater Lake National Park, season 1931. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
27 Keen, F.P. 1931. Letter dated June 8 to F.C. Craighead. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
28 Craighead, F.C. 1931. Letter dated June 24 to F.P. Keen. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
29 Craighead, F.C. 1931. Letter dated July 21 to A.E. Demaray, National Park Service. On file with: Pacific Northwest Research Station, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, Oregon 97850.
