000			00412nam a2200145Ia 4500
008			240305s9999||||xx |||||||||||||| ||und||
020			_a9783030673598
041			_aeng
082			_a621.382 _bT21 SPE
100			_aSpeidel, Joachim _917443
245		0	_aIntroduction to digital communications: signals and communication technology
250			_a2nd Ed.
260			_aSwitzerland _bSpringer _c2021
942			_cBK
999			_c29664 _d29664