00844nam a2200253Ia 4500 HEL-DAT-ONS-9780131988705 20260515080909.0 260515s9999 xx 000 0 und d 9.78013E+12 PK-LaCU English 621.3981 HEL HEL "Helmers,Scotta" Data communications A beginner's guide to concepts and technology New Jersey Prentice Hall 1989 xviii 558 Soft Binding 390.00 Rs. "Faculty, students and Staff" Electrical Engineering "Data, communications" DDC Book HEL 197 197 0 0 DDC 0 0 CE ML ML DCE 2026-05-15 Vanguard Books 390.00 0 621.3981 HEL 291 2026-05-15 08:09:09 Copy 1 2026-05-15 BK 0 0 DDC 0 0 CE ML ML DCE 2026-05-15 Vanguard Books 2653.00 0 621.3981 HEL 314 2026-05-15 08:09:09 Copy 2 2026-05-15 BK