| 其他書名 | A Strategic Plan for Improving the Natural Resource Program of the National Park Service |
| 出版 | U.S. Department of the Interior, National Park Service, 1992 |
| URL | http://books.google.com.hk/books?id=M4pNAQAAMAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |