| 其他書名 | An Exploratory Study of the Petrographic Constitution of the Meigs Creek (No. 9) Bed Coal of Ohio with Introductory Description of the Prevailing Methods of Coal Microscopy |
| 出版 | State of Ohio, Department of Natural Resources, Division of Geological Survey, 1955 |
| URL | http://books.google.com.hk/books?id=9R5KAQAAMAAJ&hl=&source=gbs_api |