TY  - BOOK
AU  - Norton, Peter
TI  - Peta Norton's DOS guide revised of expanded
SN  - 08769259310
U1  - 5.446/NOR 
PY  - 1989///
CY  - New Delhi
PB  - Prentice hall of india
KW  - MS-DOS
KW  - Operating systems
ER  -