| 其他書名 | With an Illustrated Summary of the Natural Vegetation of North America |
| 出版 | Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, 1980 |
| URL | http://books.google.com.hk/books?id=h3mujtj_4SUC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |