000 00248 a2200073 4500
245 0 _aSeminar on the Planning of Broadcasting Systems /
_c.
_nPart 1
710 2 _aInternational Telecommunication Union.
_eWydawca
_4pbl
260 _aGeneva :
_bITU,
_c1973.
300 _a316 s.;
_c34 cm.
999 _c11145
_d11145