CCIR Plenary Assembly Duesseldorf, 1990 :   Recommendations : Frequency Sharing and Coordination Between Systems in the Fixed-Satellite Service and Radio-Relay Systems /   Vols 4/9 Part 2+Annex 

 - Geneva :   ITU,   1990. 
 - V, 21 s.+Annex;   30 cm. 
<br/><br/><label>ISBN: </label>9261042015