TY  - BOOK
AU  - O'Brien,James A.
AU  - Durham,John W.
TI  - PC Software Workbook: A Tutorial Introduction to : the PC and DOS : PC-Write : PC-Calc : PC-File 
SN  - 025606704X
PY  - 1989///
CY  - Boston
PB  - Richard D. Irwin Inc.
ER  -