Geology and mineral resources of part of the Cumberland Gap coal field, Kentucky
| Image |  |
|---|---|
| Description | scholarly article by George Hall Ashley published in January 1906 |
| Author/s |
author: George Hall Ashley |
| Publication date | 1906 |
| Language | English |
| Country of origin | |
| Wikipedia link | |
| Copyright status |
public domain in United States. |
| Missing/wrong data? | Edit Wikidata item |