Seidel, K. W., & Pacific Northwest Research Station. (1989). A ponderosa pine-lodgepole pine spacing study in central Oregon: Results after 20 years. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station.
Chicago Style (17th ed.) CitationSeidel, Kenneth W., and Pacific Northwest Research Station. A Ponderosa Pine-lodgepole Pine Spacing Study in Central Oregon: Results After 20 Years. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1989.
MLA (8th ed.) CitationSeidel, Kenneth W., and Pacific Northwest Research Station. A Ponderosa Pine-lodgepole Pine Spacing Study in Central Oregon: Results After 20 Years. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1989.
Warning: These citations may not always be 100% accurate.