| 其他書名 | Coding Instructions for Pennsylvania |
| 出版 | Eastern Energy and Land Use Team, Office of Biological Services, Fish and Wildlife Service, U.S. Department of the Interior, 1979 |
| URL | http://books.google.com.hk/books?id=3R0lsfLyy-cC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |