Handbook of line communication  vol. 1, a comprehensive textbook dealing with the theoretical and practical aspects of the transmission of intelligence over lines 
His Majesty's Stationery Office 
 - London  Her Majesty's Stationary Office  1947 
 - 875p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Handbooks-Line Communication<br/>NASA Thesaurus 
<br/><br/><label>Universal Decimal Class. No.: </label>(035)621.396  / BIR