Coba jelasin Lihat pula dari Batu bara dong

Daftar perusahaan batu bara Indonesia

Hughes. Herbert W, A Text-Book of Mining: For the use of colliery managers and others (London, many editions 1892-1917), the standard British textbook for its era.

Charles V. Nielsen and George F. Richardson. 1982 Keystone Coal Industry Manual (1982)

Saleem H. Ali. Minding our Minerals, 2006.

A.K. Srivastava. Coal Mining Industry in India (1998) (ISBN 81-7100-076-2)

James Tonge. The principles and practice of coal mining (1906)