00460 2200181 4500001002100000005001500021035002000036008004100056245004500097110001100142260002700153300002900180084001700209082001100226650001100237650001900248990001100267INLIS00000000003138520220410092758 a0010-1218013223220410 g 0 eng 1 aCommunication in the space age /cUnesco0 aUNESCO aParis :bUnesco,c1968 a200 p. :bill. ;c24 cm. a621.39 UNE c a621.39 4aSPACES 4aCOMMUNICATIONS a818/70