Transvaal and Orange Free State Chamber of Mines. (1897). The mining industry: Evidence and report of the Industrial commission of enquiry, with an appendix containing the letter of the Chamber of mines to the Commission, the principal laws of the republic affecting the mining industry, and other documents of interest appertaining to the evidence given at the enquiry. Johannesburg: Times printing and publishing works.

Transvaal and Orange Free State Chamber of Mines. The Mining Industry: Evidence and Report of the Industrial Commission of Enquiry, With an Appendix Containing the Letter of the Chamber of Mines to the Commission, the Principal Laws of the Republic Affecting the Mining Industry, and Other Documents of Interest Appertaining to the Evidence Given At the Enquiry. Johannesburg: Times printing and publishing works, 1897.

Transvaal and Orange Free State Chamber of Mines. The Mining Industry: Evidence and Report of the Industrial Commission of Enquiry, With an Appendix Containing the Letter of the Chamber of Mines to the Commission, the Principal Laws of the Republic Affecting the Mining Industry, and Other Documents of Interest Appertaining to the Evidence Given At the Enquiry. Johannesburg: Times printing and publishing works, 1897.