TY  - BOOK
AU  - Hansen, Per Brinch
TI  - Operating systems principles
SN  - 0876921357
U1  - 005.43 
PY  - 1986///
CY  - New Delhi
PB  - Prentice hall of India
KW  - Computer programming
KW  - Operating systems
KW  - System software
ER  -