1956 · F.C. Widdis · The proceedings of the Institution of Electrical Engineers. Part B, Radio and electronic engineering, including communication engineering · 2
1958 · F.C. Widdis · The proceedings of the Institution of Electrical Engineers. Part B, Radio and electronic engineering, including communication engineering
1956 · F.C. Widdis, A.M. Thompson · The proceedings of the Institution of Electrical Engineers. Part B, Radio and electronic engineering, including communication engineering