The Postal Museum
Spectral transformations for digital filters
1970 · A.G. Constantinides · Proceedings of the Institution of Electrical Engineers
Delay networks having maximally flat frequency characteristics
1949 · W.E. Thomson · Proceedings of the IEE - Part III Radio and Communication Engineering
Investigation of multiple f.m./f.d.m. carriers through a satellite t.w.t. operating near to saturation
1967 · R.J. Westcott · Proceedings of the Institution of Electrical Engineers