| 其他書名 | Potomac River Gorge, Virginia, July 13, 1989 |
| 出版 | American Geophysical Union, 1989 |
| 主題 | Science / Earth Sciences / GeneralTechnology & Engineering / Civil / General |
| ISBN | 087590582X9780875905822 |
| URL | http://books.google.com.hk/books?id=mfWHAAAACAAJ&hl=&source=gbs_api |