TY  - BOOK
AU  - Southworth,Rod B.
TI  - DOS essentials
SN  - 0878356908
U1  - QA/76.76.O63 
PY  - 1991///
CY  - Boston
PB  - Boyd & Fraser.
KW  - MS-DOS (Computer operating system).
KW  - PC DOS (Computer operating system).
ER  -