Principles and practice of multi-frequency telegraphy /
Ralphs, J. D.
Principles and practice of multi-frequency telegraphy / J. D. Ralphs. - London, UK : P. Peregrinus on behalf of the Institution of Electrical Engineers, 1985. - x, 205 p. : ill. ; 24 cm. - IEE telecommunications series ; 11 .
'Errata' slip inserted.
Includes bibliographical references and index.
0863410227 RM332.20
84-224784
Telegraph, Wireless.
Principles and practice of multi-frequency telegraphy / J. D. Ralphs. - London, UK : P. Peregrinus on behalf of the Institution of Electrical Engineers, 1985. - x, 205 p. : ill. ; 24 cm. - IEE telecommunications series ; 11 .
'Errata' slip inserted.
Includes bibliographical references and index.
0863410227 RM332.20
84-224784
Telegraph, Wireless.