Technical Education in South Afl-ica

• ZA HPRA A1138-GGG-2435
• Bestanddeel

Part of James Charles Napoleon Humphreys, Mining papers

Power V.F.P.- E. Supply Commission

• ZA HPRA A1138-GGG-2449
• Bestanddeel

Part of James Charles Napoleon Humphreys, Mining papers

Chemical, Metallurgical and Mining Society of S.A.

• ZA HPRA A1138-GGG-2448
• Bestanddeel

Part of James Charles Napoleon Humphreys, Mining papers

The Associated Scientific and Technical Societies of S.A.

• ZA HPRA A1138-GGG-2447
• Bestanddeel

Part of James Charles Napoleon Humphreys, Mining papers

Government Mining Engineers Reports

• ZA HPRA A1138-HHH-2503
• Bestanddeel

Part of James Charles Napoleon Humphreys, Mining papers

Government Lease Scales and Payments

• ZA HPRA A1138-HHH-2501
• Bestanddeel

Part of James Charles Napoleon Humphreys, Mining papers

Mining Personalities

• ZA HPRA A1138-III-2531
• Bestanddeel

Part of James Charles Napoleon Humphreys, Mining papers

Rhodesian Copper

• ZA HPRA A1138-LLL-2620
• Bestanddeel

Part of James Charles Napoleon Humphreys, Mining papers

Rhodesian Asbestos and Chrome Synd. Ltd. Ethel Mine

• ZA HPRA A1138-KKK-2588
• Bestanddeel

Part of James Charles Napoleon Humphreys, Mining papers

Shabani Asbestos Mine

• ZA HPRA A1138-KKK-2587
• Bestanddeel

Part of James Charles Napoleon Humphreys, Mining papers