| Type |  Book |
| ชื่อเรื่อง | Levels-of-growing-stock cooperative study in Douglas-fir : report no.8-the LOGS study ; twenty-year results / Robert O. Curtis and David D. Marshall |
| ผู้แต่ง | Curtis, Robert O |
| พิมพลักษณ์ | Portland, Or. : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [1986] |
| รูปเล่ม | 113 p. : ill., map |
| หัวเรื่อง | Douglas fir --Canada [] |
| | Douglas fir --Oregon [] |
| | Douglas fir --Washington (State) [] |
| | Trees --Oregon --Growth --Statistics [] |
| | Trees --Washington (State) --Growth --Statistics [] |