| 其他書名 | Recreation use and benefit estimation techniques |
| 出版 | U.S. Army Corps of Engineers, Water Resources Support Center, Institute for Water Resources, 1986 |
| URL | http://books.google.com.hk/books?id=ZUuOTk4OAA8C&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |