Report on the preinvestiment and tariff study for the telecommunications administration/ Ministry of Transportation and Communications 

 - Washington:  Direction General of Posts & Telecommunications,  1979 
 - 
<br/><br/> exemplares 
<br/><br/><label>LCCN: </label>true true 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecomunicacoes
<br/><br/><label>Universal Decimal Class. No.: </label>1654.077 MIN re