| 其他書名 | A Framework for Identifying Significant Sites |
| 出版 | National Park Service, U.S. Department of the Interior, National Historic Landmarks Survey, National Register, History and Education, 2002 |
| URL | http://books.google.com.hk/books?id=L52U-Q85QrsC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |