TY  - BOOK
AU  - Thomas, Rebecca Yates, Jean 
TI  - User guide to the unix system 
SN  - 0-07-463115-2 
U1  - 00 5.43 THO  
PY  - 2001///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - Operating systems
ER  -