Bates J., Bates M.
Principles of voice and data communications 0 0 - 0 - 0 McGraw-Hill 2007 - 782 0 0 - 0 .
0
0
0
NULL
3500
0
621.382 B-30 / 0
Principles of voice and data communications 0 0 - 0 - 0 McGraw-Hill 2007 - 782 0 0 - 0 .
0
0
0
NULL
3500
0
621.382 B-30 / 0