000 00238 a2200073 4500
245 0 _aEarthing of telecommunication installations /
_c.
710 2 _aInternational Telecommunication Union.
_eWydawca
_4pbl
260 _aGeneva :
_bITU,
_c1976.
300 _aIV,51 s.;
_c34 cm.
999 _c4742
_d4742