TY  - BOOK
AU  - Norton, Peter  .
ED  -                                                                                                                                                                                                                                                                . 
TI  - Peter Norton`s DOS guide / 
U1  - 005.43 
PY  - 1995///
CY  - New Delhi : 
PB  - Prentice Hall of India Pvt Ltd. , 
ER  -