- 1A. J. Spencer
Miners' Lighting Appiances : with descriptive and historical notes and illustrations
1925; 56 S. : Ill., graph. Darst.
London / Science Museum; Grubenlampe; Katalog - 2A. J. Spencer
Metallurgy : with descriptive and historical notes and illustrations
1925; 70 S. : Ill., graph. Darst.
London / Science Museum; Katalog; Metall / Technologie - 3A. J. Spencer
Agricultural Implements & Machinery
1930; 94 S. : Ill.
London / Science Museum; Katalog; Landwirtschaft; Landmaschine