Guillemin, Ernst a., 'Communication Networks Vol.1 the classical Theory of Lumped Constant Networks' (1931) and 'Vol.2 the classical Theory of long lines, Filters and related Networks' (1935) [John Wiley & Sons, New York]; also, Terman, Frederick Emmons, 'Radio Engineers' Handbook' [McGraw-Hill, New York, 1943]; all h/cover. (3).