Volume 77, Number 1&2, 1990
Don Pigozzi:
Data Types over Multiple-Values Logics.
161-194
Eric G. Wagner:
An Algebraically Specified Language for Data Directed Design.
195-219
Volume 77, Number 3, 1990
Seinosuke Toda:
Positive Relativizations for Log Space Computability.
221-235
Yasuo Kawahara:
Pushout-Complements and Basic Concepts of Grammars in Toposes.
267-289