TY  - BOOK
AU  - BRADLEY,Ray
TI  - Understanding Computer Science for advanced level: the study guide 
SN  - 978-0-7487-6147-0
U1  - 004.01 BRA 
PY  - 2001///
CY  - Cheltenham
PB  -  Nelson thornes
KW  - Data processing Computer science
ER  -