Hilt, D. E., Herman, F. R., & Bell, J. F. (1977). A test of commercial thinning on the hemlock experimental forest. Pacific Northwest Forest and Range Experiment Station, USDA Forest Service.
Chicago-Zitierstil (17. Ausg.)Hilt, Donald E., Francis R. Herman, und John F. Bell. A Test of Commercial Thinning on the Hemlock Experimental Forest. Portland, Or: Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, 1977.
MLA-Zitierstil (9. Ausg.)Hilt, Donald E., et al. A Test of Commercial Thinning on the Hemlock Experimental Forest. Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.