Dix, K. (1988). What's a coal miner to do?: The mechanization of coal mining. University of Pittsburgh Press.
Lua i Stíl Chicago (17ú heag.)Dix, Keith. What's a Coal Miner to Do?: The Mechanization of Coal Mining. Pittsburgh, Pa.: University of Pittsburgh Press, 1988.
Lua MLA (9ú heag.)Dix, Keith. What's a Coal Miner to Do?: The Mechanization of Coal Mining. University of Pittsburgh Press, 1988.
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