Title Author
Hi-Fi devices Jan Różycki
Radio Listener's ABC Radio Tips and Knowledge Spółka Wydawnicza RA
Low frequency amplifiers R.M. Malinin
Amateur electroacoustic amplifiers Aleksander Witort
Radio and Television Equipment Catalog "UNITRA" 1975 UNITRA
Transformers and chokes Mieczysław Flisak
The Radio Amateur's Handy Encyclopedia T. Danowski, L. Niemcewicz
How to measure correctly - measurement technique and measurement error in electronics Dieter Nührmann
Television, or How Man Learned to See at a Distance Feliks Burdecki
Empfängerschaltungen der radio-industrie Band II Heinz Lange, Heinz K. Nowisch

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