TY  - BOOK
AU  - Ruff,Laura
AU  - Weitzer,Mary
TI  - Understanding and using MS-DOS / PC DOS: the first steps 
SN  - 0314503307
PY  - 1989///
CY  - St.Paul, Id.
PB  - West Publ. Comp.
KW  - Computer science
KW  - MS-DOS (Computer operating system)
ER  -