Trautmann, Kurt <br/><br/>
Design of automatic telephone exchanges/ 
Kurt Trautmann; translated from German by K. H. Brinkmann 
 - Berlin:  Siemens Aktienesellschaft,  c1967 
 - 2v.:  col. ill.;  21 cm. 
<br/><br/> Includes index  Library has vol. 1&2 
<br/><br/>Vol. 1, Circuit units and functions, 1967-v. 2, Principles. 
<br/><br/><label>ISBN: </label> £ 3.60  £ 4.30 (vol. 2) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telephone, Automatic<br/>Telephone switching systems, electronic<br/>Telephone systems<br/>Telephone relays<br/>Telephone, Dial
<br/><br/><label>Dewey Class. No.: </label>621.3877