| 其他書名 | Proceedings of a Workshop, March 9-13, 1992, Portal, Arizona |
| 出版 | Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, 1992 |
| URL | http://books.google.com.hk/books?id=hf4TAAAAYAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |