TY  - BOOK
AU  - Simithabha Das
TI  - Unix: Concepts and Applications 
SN  - 9780070635463
U1  - 1581-1/2 005.432 
PY  - 2017///
CY  - New Delhi
PB  - McGraw Hill Edu.
KW  - Operating System
KW  - Unix
ER  -