TY  - BOOK
AU  - Litton,Gerry
TI  - Understanding PFS: first choice 
SN  - 9813091584 (pbk.)
AV  - QA76.76.I57 L58 1989 
U1  - 005.39/2 20 
PY  - 1989///
CY  - Singapore : 
PB  - Tech Publications, 
KW  - Integrated software
N1  - Includes index
ER  -