| 其他書名 | A Case Study of Prince Georges and Montgomery Counties, Maryland |
| 出版 | U.S. Department of Agriculture, Economic and Statistical Analysis Division, Economic Research Service, 1963 |
| URL | http://books.google.com.hk/books?id=5YyrDsKr5x8C&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |