| Type |  Book |
| ชื่อเรื่อง | True fir-hemlock spacing trials : design and first results / Robert O. Curtis, Gary W. Clendenen, and Jan A. Henderson |
| ผู้แต่ง | Curtis, Robert O |
| พิมพลักษณ์ | [Washington, D.C.] : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [2000] |
| รูปเล่ม | 35 p. : ill., map |
| หัวเรื่อง | Fir --Spacing --Oregon [] |
| | Fir --Spacing --Washington (State) [] |
| | Forest thinning --Cascade range [] |
| | Forest thinning --Oregon [] |
| | Forest thinning --Washington (State) [] |
| | Trees --Spacing --Cascade range [] |
| | Trees --Spacing --Oregon [] |
| | Trees --Spacing --Washington (State) [] |
| | Trees --Cascade range --Growth [] |
| | Trees --Oregon --Growth [] |
| | Trees --Washington (State) --Growth [] |