Direction of traffic : trading telecom minutes  

 - 3rd ed.  
 - Geneva :  ITU ,  c1999 
 - ix, 347 p. :  ill. ;  30m 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Taxes
<br/><br/><label>Dewey Class. No.: </label>336.2