TY  - BOOK
AU  - Bradley, Ray.,
TI  - Understanding computer science: for advanced level 
SN  - 0748719792 (paperback)
PY  - 1970///
CY  - Cheltenham
PB  - Stanley Thornes, 
KW  - Computers
KW  - Electronic data processing
N1  - Includes answers; Includes index
ER  -