APA (7th ed.) Citation

Mason, R. R., Pacific Northwest Forest and Range Experiment Station, & Service, U. S. F. (1977). Sampling low density populations of the Douglas-fir tussock moth by frequency of occurrence in the lower tree crown. Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service.

Chicago Style (17th ed.) Citation

Mason, Richard R., Pacific Northwest Forest and Range Experiment Station, and United States. Forest Service. Sampling Low Density Populations of the Douglas-fir Tussock Moth by Frequency of Occurrence in the Lower Tree Crown. Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1977.

MLA (8th ed.) Citation

Mason, Richard R., et al. Sampling Low Density Populations of the Douglas-fir Tussock Moth by Frequency of Occurrence in the Lower Tree Crown. Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1977.