TY  - BOOK
AU  - Welsh, Michael J.
TI  - Study guide and workbook: computers concepts and uses Mary Sumner 
SN  - 0131637673
U1  - 001.64 
PY  - 1985///
CY  - New Jersey
PB  - Prentice-Hall
KW  - Computer science
N1  - Study guide and workbook
ER  -