TY  - BOOK
AU  - "Stallings , William"
TI  - Data and computer communications
SN  - 81-203-1240-6
U1  - 004.6 STA 5th
CY  - New Delhi
PB  - Prentice Hall 
KW  - Computer Science
KW  - "Data, computer,  communications"
N1  - "Faculty, students and Staff"
UR  - https://libgen.is/book/index.php?md5=F4E41FB71FC6EDB42BDE77FD7542EC36
ER  -