| 其他書名 | Second International Symposium, February 5-9, 1997, Winnipeg, Manitoba, Canada |
| 出版 | North Central Research Station, Forest Service, U.S. Department of Agriculture, 1997 |
| URL | http://books.google.com.hk/books?id=w7AreEYOMdgC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |