W.P. Tams Jr., Smokeless Coal Fields of West Virginia: A Brief History (1963; 2nd ed. 2001), pp. 4-8; written by a paternalistic mine owner. excerpt and text search
Curtis, Ben (2011). „A Tradition of Radicalism: The Politics of the South Wales Miners, 1964-1985”. Labour History Review. 76 (1): 34—50. doi:10.1179/174581810X12922570703557.