000 00236 a2200073 4500
245 0 _aConference on Trunk Telecommunications /
_c.
710 2 _aInstitution of Electrical Engineering.
_eWydawca
_4pbl
260 _aLondon :
_bIEE,
_c1970.
300 _aXIV, 364 s.;
_c30 cm.
999 _c2457
_d2457