| Type |  Book |
| ชื่อเรื่อง | Productivity of forests of the United States and its relation to soil and site factors and management practices : a review / Charles C. Grier ... [et al.] |
| พิมพลักษณ์ | Portland Or. : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [1989] |
| รูปเล่ม | 51 p. : ill |
| หัวเรื่อง | Forest productivity --United States [] |
| | Forest site quality --United States [] |
| | Forest soils --United States [] |