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McGregor, M.D., M.M. Furniss, W.E. Bousfield, D.P. Almas, P.J. Gravelle, and
R.D. Oakes. 1974. Evaluation of the Douglas-fir beetle infestation,
North Fork Clearwater River drainage, northern Idaho, 1970-73. USDA
Forest Service, Northern Region, State and Private Forestry, Missoula,
Montana. Insect and Disease Report 74-7. 17 pp.
Norman, G.G. and N.L. Fritz. 1965. Infrared photography as an indicator of
disease and decline in citrus trees. Proc. Fla. Sta. Hort. Soc.
78:59-63.
Price, T.S. and C. Doggett. 1978. A history of southern pine beetle outbreak
in the southeastern United States. South. Forest Insect Working Group.
Ga. Forestry Comm., Macon, GA. 31 pp.
USDA. 1958. Timber Resources for America's Future. U.S. Forest Service.
Forest Resource Report 14. 713 pp.
Wear, J.S. and J. Bongberg. 1951. The use of aerial photographs in forest
insect surveys. J. Forestry. 49:632-633.
Wear, J.S., R.B. Pope, and P.G. Lauterbach. 1964. Estimating beetle killed
Douglas-fir by aerial photo and field plots. J. Forestry. 62:309-315.
Wert, S.L. and B. Roettgering. 1968. Douglas-fir beetles survey with color
photos. Photogram. Engineering. 34:1243-1248.
Prepared June 23, 1978