TY  - BOOK
AU  - Das, Sumitabha 
TI  - Unix: conepts and applications 
SN  - 0-07-463090-3 
U1  - 005.43 DAS  
PY  - 1998///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - Operating systems
ER  -