Telecommunication services for developing economies  proceeding of the ITC specialist seminar, Krakow, Poland, 22-27 April, 1991 
edited by Janusz Filipiak 
 - Amsterdam  Elsevier North-Holland  1991 
 - 693 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0444893326 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication--Traffic--Congresses<br/>Telecommunication systems--Congresses<br/>Integrated services digital networks--Congresses<br/>Computer networks--Congresses