Titlebook: HIV und AIDS; Ein Leitfaden für ?r HIV-Arbeitskreis Südwest,Deutsche AIDS-Hilfe e.V. Book 20014th edition Springer-Verlag Berlin Heidelberg

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Conditional Logic,o provide formal models for the semantical structure of conditionals. It had also been suggested that a proper logic for conditionals might be provided by combining modal operators with material conditionals in some way, but this suggestion never led to any widely accepted formal logic for condition