| 其他書名 | Proceedings of the Northeastern Forest Resource Planners Association, Eleventh Annual Conference, June 4-7, 1989, Hilton Inn, Grand Rapids, Michigan |
| 出版 | Northeastern Forest Resource Planners Association, 1989 |
| URL | http://books.google.com.hk/books?id=yMPeGwAACAAJ&hl=&source=gbs_api |