Snellgrove, T. A., Plank, M. E., & Lane, P. H. (1973). An improved system for estimating the value of western white pine. Pacific Northwest Forest and Range Experiment Station, USDA Forest Service.
Chicago Style (17th ed.) CitationSnellgrove, Thomas A., Marlin E. Plank, and Paul H. Lane. An Improved System for Estimating the Value of Western White Pine. Portland, Or: Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, 1973.
MLA (9th ed.) CitationSnellgrove, Thomas A., et al. An Improved System for Estimating the Value of Western White Pine. Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, 1973.
Warning: These citations may not always be 100% accurate.