TY  - BOOK
AU  - Christopher,Ken W.
AU  - Feigenbaum,Barry A.
AU  - Saliga,Shon O.
TI  - The new DOS 4.0
SN  - 047150257X
U1  - QA/76.76.O63 
PY  - 1989///
CY  - New York
PB  - John Wiley & Sons
KW  - DOS 4 (Computer operating system).
KW  - PC-DOS (Computer operating system).
ER  -