| 其他書名 | Background Information to Accompany Folio of Geologic and Mineral-resource Maps of the Rolla 1° X 2° Quadrangle, Missouri |
| 出版 | U.S. Government Printing Office, 1991 |
| URL | http://books.google.com.hk/books?id=dDrefz666WAC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |