TY  - BOOK
AU  - Unknown
TI  - Microsoft ms-dos upgrade operating system user's guide
PY  - 1994///
CY  - [S.l.]
PB  - Microsoft Corp
N2  - User's guide to MS-DOS Upgrade 6.22 - 1994
UR  - http://www.amazon.com/exec/obidos/ASIN/B000X3HDQI/chopaconline-20
ER  -