| 其他書名 | Progress Report 1 to the USDI Bureau of Land Management, Salt Lake City, Utah, July 1979 to May 1980 |
| 出版 | USDA-Forest Service, Intermountain Forest and Range Experiment Station, 1980 |
| URL | http://books.google.com.hk/books?id=dGKF0AEACAAJ&hl=&source=gbs_api |