00310nam a2200085Ia 4500008004100000040003800041100002000079245008900099260003600188220119s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aGabbay, Dov. M. 0aInvestigations in Modal and Tense Logics With Applications To Problems Philosophy...  bD.Reidel Pub. Co.aBostonc1976