From Citizendium, the Citizens' Compendium
- Please sort and annotate in a user-friendly manner and consider archiving the URLs behind the links you provide. See also related web sources.
- Coal Information From website of the World Coal Institute.
- What is coal?
- Methods of Mining Excellent source of information on coal mining methods.
- Background Information--How is coal mined? From website of the Kentucky Foundation.
- Coal (USGS)
- Coal (EIA)
- Coal at European energy forum
- Open Source Coal — CC-licensed information about coal production in the United States