Kessler, Gary C..
ISDN Concepts Facilities and Services / 1 t. Kessler Gary C., Southwick Peter V.. - Signature 4 edition. - New York : McGraw-Hill, 1998. - XXVII, 3 s.: il.; 24 cm.
007034437X
ISDN Concepts Facilities and Services / 1 t. Kessler Gary C., Southwick Peter V.. - Signature 4 edition. - New York : McGraw-Hill, 1998. - XXVII, 3 s.: il.; 24 cm.
007034437X