LEADER 00772nam0-22002651i-450- 001 990003985900403321 005 20031210174551.0 035 $a000398590 035 $aFED01000398590 035 $a(Aleph)000398590FED01 035 $a000398590 100 $a20030922d--------km-y0itay50------ba 101 0 $aeng 200 1 $aRadio spectrum conservation$eA program of conservation based on present uses and future needs 210 $aNew York$cmcgraw-hill$d1952 610 0 $aonde radio 610 0 $aottica 710 $aJoint Technical Advisory Committee$0150475 801 0$aIT$bUNINA$gRICA$2UNIMARC 901 $aBK 912 $a990003985900403321 952 $a00 I1398$b2586$fDETEC 959 $aDETEC 996 $aRadio spectrum conservation$9474144 997 $aUNINA