| 其他書名 | Candid Expressions of Research Needs by Land Managers and Scientists in Western North America |
| 出版 | Intermountain Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, 1974 |
| URL | http://books.google.com.hk/books?id=Hu-GAQAACAAJ&hl=&source=gbs_api |