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This material also appears in my Ph. D. thesisStudies in philosophical logic and its history (University of Pittsburgh). I am heavily indebted to Nuel Belnap. It was from him that I first learned Bressan's system. His (devastating) comments on an earlier version of this paper have lead to substantial revision.
Allatum est die 24 Maii 1975
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Parks, Z. Investigations into quantified modal logic-I. Stud Logica 35, 109–125 (1976). https://doi.org/10.1007/BF02120875
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DOI: https://doi.org/10.1007/BF02120875