Commonwealth telecommunications bureau :  telecommunications traffic statistics 1971/1972. 
 Telecommunications Traffic Statistics 

 - London:   [s.n.],   1972.  
 - 82 p. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics<br/>Telecommunications<br/>Commonwealth communications
<br/><br/><label>Dewey Class. No.: </label>621.382