Richards, D.L. <br/><br/>
Telecommunication by speech:  the transmission performance of telephone networks/ 
D.L. Richards 
 - London:  Butterworths,  1973 
 - 589 p.;  23 cm. 
<br/><br/> Includes index 
<br/><br/>Bibliography: p. 529-577 
<br/><br/><label>ISBN: </label>040870344x  £ 35.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication systems<br/>Telecommunication lines<br/>Telephone lines
<br/><br/><label>Dewey Class. No.: </label>621.387