Nef, J. U. (1966). The rise of the British coal industry. Cass.
Lua i Stíl Chicago (17ú heag.)Nef, John U. The Rise of the British Coal Industry. [London]: Cass, 1966.
Lua MLA (8ú heag.)Nef, John U. The Rise of the British Coal Industry. Cass, 1966.
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