| 其他書名 | Summary and Background Information to Accompany Folio of Maps of the Northern Midcontinent Area, Latitude 36°-46° N. and Longitude 88°-100° W.. 1993-1994 |
| 出版 | U.S. Government Printing Office, 1984 |
| URL | http://books.google.com.hk/books?id=aGmL1yjQOX8C&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |