TY  - BOOK
AU  - Preppernau, Joan
AU  - Cox, Joyce
TI  - Windows 7 : step by step
SN  - 9788120341166
U1  - 005.446 
PY  - 2010///
CY  - New Delhi
PB  - PHI Learning Private Limited
KW  - Computer science engineering
KW  - Windows 7
ER  -