TY  - BOOK
AU  - Abiteboul S
ED  - International Conference on Database theory( 3rd : 1990 : Paris )
ED  - International Conference on Database theory 3rd
TI  - ICDT : proceedings
SN  - 3-540-53507-1
U1  - 5.74 
PY  - 1990///
CY  - Berlin
PB  - Springer Verlag
KW  - Data base theory
ER  -