Rast, E. D., Sonderman, D. L., & Gammon, G. L. (1973). A guide to hardwood log grading (Revised.). Forest Service, U.S. Department of Agriculture, Northeastern Forest Experiment Station.
Chicago Style (17th ed.) CitationRast, Everette D., David L. Sonderman, and Glenn L. Gammon. A Guide to Hardwood Log Grading. Revised. Broomall, PA: Forest Service, U.S. Department of Agriculture, Northeastern Forest Experiment Station, 1973.
MLA (9th ed.) CitationRast, Everette D., et al. A Guide to Hardwood Log Grading. Revised. Forest Service, U.S. Department of Agriculture, Northeastern Forest Experiment Station, 1973.
Warning: These citations may not always be 100% accurate.