| 其他書名 | Guidebook for the 50th Annual Meeting of the Geological Society of America, North-Central Section, April 18-19, 2016 |
| 出版 | Illinois State Geological Survey, Prairie Research Institute, 2016 |
| URL | http://books.google.com.hk/books?id=9lAxCle-su8C&hl=&source=gbs_api |