000
00303nam a2200133Ia 4500
008
160902s9999 xx 000 0 und d
040
_c
PK-GjGUL
082
_a
004.6
_b
INT-I
245
0
_a
Introduction to data communications
260
_a
Unknow
_b
unknown
300
_a
344
546
_a
eng
942
_c
BK
999
_c
4562
_d
4562