TY  - BOOK
AU  - Atherton,Roy
TI  - Structured programming with comal
SN  - 0853124167
U1  - 005.133 
PY  - 1982///
CY  - Chichester
PB  - Ellis Horwood Ltd
KW  - COMAL ( Computer program language )
KW  - Structured programming
ER  -