Coal mine - State mine - Cooling towers - Heerlen
Coal mine - State mine - Cooling towers - Treebeek
Coal - Miners - Ovoids - Eygelshoven
S.H.V. - Coal Trade Association - Utrecht
Coal stove
Stone coal - Miners lamp - Groningen
Salt tower - Hengelo
Coal stove - Coal kit - Order list
Coal mine - Oranje Nassau Mines - Heerlen
