Discussion on "Automatic telephone exchange systems"

J.E. Kingsbury, F. Gill, A. Whalley, M.S. Conner, R. Scruby, D.H. Kennedy, T. Holme, A.L. Stanton, W. Aitken
1911 Journal of the Institution of Electrical Engineers  
doi:10.1049/jiee-1.1911.0057 fatcat:oxt6ld27svhuxi2jebgri6ej7m