Monitoring Larval Populations of the Douglas-Fir Tussock Moth and the Western Spruce Budworm on Permanent Plots: Sampling Methods and Statistical Properties of Data. General Technical Report PNW-GTR-333, May 1994
Mason Richard R.
Paul H. Gene
Portland : U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station , 1994. - 23 s.: 11 obr., 6 tab.
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