TY  - BOOK
AU  - Langefors Boje
AU  -  Samuelson Kjell
TI  - Information and data in systems
T2  - Potrocelli/charter information system series
U1  - B2893P0bD65,8(B), L62 
PY  - 1976///
CY  - New York    
PB  -  Petricelli        
KW  -  Database management
KW  -  Information and retrival systems
KW  - Programming in operation research
ER  -