| Type |  Book |
| ชื่อเรื่อง | Physical characteristics of study plots across a Lake States acidic deposition gradient / Lewis F. Ohmann, David F. Grigal, and Sandra Brovold |
| ผู้แต่ง | Ohmann, Lewis F |
| พิมพลักษณ์ | St. Paul, Minn. : U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station, 1989 |
| รูปเล่ม | 47 p. : ill |
| หัวเรื่อง | Acid deposition --Lake States [] |
| | Forest site quality --Lake States [] |
| | Forest soils --Lake States [] |
| | Trees --Lake States --Effect of acid deposition on [] |