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Volume 2
Content of Issue 7
Managing Editor's Column
H. Maurer
514
On Combining the Knowledge of Heterogeneous Information Repositories
U. M. Borghoff
, J. H. Schlichter
515
Ceilings of Monotone Boolean Functions
P. E. Dunne
533
Disjunctive Omega-Words and Real Numbers
P. Hertling
549