Twito, R. H., & Mann, C. N. (1979). Determining average yarding distance. Pacific Northwest Forest and Range Experiment Station, USDA Forest Service.
Chicago-Zitierstil (17. Ausg.)Twito, Roger H., und Charles N. Mann. Determining Average Yarding Distance. Portland, Or: Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, 1979.
MLA-Zitierstil (9. Ausg.)Twito, Roger H., und Charles N. Mann. Determining Average Yarding Distance. Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, 1979.
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