| 其他書名 | Administrative, Historical, and Architectural Data Sections : Slateford Farm Complex, Delaware Water Gap National Recreation Area, Pennsylvania |
| 出版 | U.S. Department of the Interior, National Park Service, 1988 |
| URL | http://books.google.com.hk/books?id=I-xVCVxK9e4C&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |