Siemns, and Halske  <br/><br/>
Introduction to Telephone Engineering / 
Siemens and Halske Aktiengesellschaft 
 - Berlin :  Siemens and Halske,  1962 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telephone Engineering
<br/><br/><label>Dewey Class. No.: </label>621.388  / SIE