TY  - BOOK
AU  - Das, sumithabha 
TI  - Unix :concepts and applications. 
SN  - 0-07-053475-6 
U1  - 005.43 DAS  
PY  - 2003///
CY  - Tata Mc-Graw hill 
PB  - New Delhi 
KW  - Operating systems
ER  -