Tabellenbuch Fernsprechverkehrstheorie 

 - 3rd reviced ed, 1981 of Telephone traffic theory, tables and charts, part 1 
 - Berlin  Siemens Aktiengesellschaft  1970 
 - 417p. ill. 22cm 
<br/><br/> Accompanied by working chart 1 and 2 for traffic variance method  Text in German and English 
<br/><br/>Bibliography: p.404-407 
<br/><br/><br/>gereng 
<br/><br/><label>ISBN: </label>3800913437 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telephone systems--Tables