Remarks on ¿Siemens' system of railway gong signalling¿
Spagnoletti, C.E., Preece, W.H., Siemens, Alexander, Ayrton, W.E., von Treuenfeld, Fischer, Webber, C.E.Volume:
11
Year:
1882
Language:
english
DOI:
10.1049/jste-2.1882.0005
File:
PDF, 903 KB
english, 1882