Wacnuts - Stone coal
The Staveley Coal and Iron Company - Form of Proxy
Mining
Reading Anthracite - Coal
Table salt - Royal Dutch Salt Industry - Boekelo
Coal mine - State mine - Cooling towers - Heerlen
Coal
Anthracite
Coal - Miners - Ovoids - Eygelshoven
Coal mine - State mine - Cooling towers - Treebeek
