000 00275nam a2200109 4500
020 _a978-1-98462-571-7
082 _aCir. 621 T267 C2019
245 _aTelecommunication Technology
260 _aNew York
_b3G E-Learning
_c2019
300 _bxii., 246p.; ill.: 23.5cm
942 _cBK
999 _c3779
_d3779