000 00270nam a2200109Ia 4500
008 190911s9999||||xx |||||||||||||| ||und||
100 _aJohn D. Spragins
245 0 _aTelecommunications Protocols And Design
260 _aUSA
_bPearson
_c1991
300 _a716
942 _cBK
999 _c6841
_d6841