Dyfyniad APA

Simpson, J. B. (1900). Capital and labour in coal mining during the past two hundred years. R. Robinson.

Dyfyniad Arddull Chicago

Simpson, John Bell. Capital and Labour in Coal Mining During the Past Two Hundred Years. Newcastle-upon-Tyre: R. Robinson, 1900.

Dyfyniad MLA

Simpson, John Bell. Capital and Labour in Coal Mining During the Past Two Hundred Years. R. Robinson, 1900.

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