Ruth, R. H., & Harris, A. S. (1975). Forest residues in hemlock-spruce forests of the Pacific Northwest and Alaska: A state-of-knowledge review with recommendations for residue management. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station.
Chicago Style (17th ed.) CitationRuth, Robert H., and A. S. Harris. Forest Residues in Hemlock-spruce Forests of the Pacific Northwest and Alaska: A State-of-knowledge Review with Recommendations for Residue Management. Portland, Ore: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1975.
MLA (9th ed.) CitationRuth, Robert H., and A. S. Harris. Forest Residues in Hemlock-spruce Forests of the Pacific Northwest and Alaska: A State-of-knowledge Review with Recommendations for Residue Management. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1975.