1. Report on the Mining Methods and Appliances Used in the Anthracite Coal Fields;Chance,1883
2. Virginia coal fields;Eby,1944
3. Guidebook to the Geology of the Richmond and Taylorsville Basin, East-Central Virginia;Goodwin,1985
4. Account of the coal mines in the vicinity of Richmond, Virginia;Grammer;American Journal of Science,1819
5. Virginia Coal: An Abridged History;Hibbard,1990