| 其他書名 | Area III : [Wisconsin, Minnesota, North Dakota, South Dakota, and Northern Iowa] |
| 出版 | Farmer Cooperative Service, U.S. Department of Agriculture, 1958 |
| URL | http://books.google.com.hk/books?id=Xw8dq12k5CcC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |