000 00225 a2200073 4500
245 0 _aTelecommunication Planning /
_c.
710 2 _aITT Standard Electrica.
_eWydawca
_4pbl
260 _aMadrid :
_bITT Standard Electrica,
_c1977.
300 _aIV, 57 s.;
_c0 cm.
999 _c12628
_d12628