TY  - BOOK
AU  - Cassel, Don
TI  - Learning Dos, word perfect 5.0, lotus1-2-3, and d base III plus
SN  - 0139461612
U1  - 005.268 
PY  - 1990///
CY  - New Jersey
PB  - Prenticehall
KW  - Computer operating system
KW  - Computer programe
ER  -