Ploiești National Coal Company was created in 1957.
National Hard Coal Company was created in 1998.
National Hard Coal Company's population is 2,007.
The population of Ploiești National Coal Company is 2,009.
Ploiești National Coal Company's population is 100.
National Hard Coal Company's population is 11,740.
National Coal Board was created in 1946.
United Coal Company was created in 1970.
Coal Company Zarechnaya was created in 2008.
Arctic Coal Company was created in 1906.
Sheffield Coal Company was created in 1805.
Alloa Coal Company was created in 1835.
Siberian Coal Energy Company was created in 2001.