Contextual quantum mechanics / Dick J. HoekzemaHausdorff gaps and limits / Ryszard Frankiewicz, Pawel ZbierskiDiscrete wiskunde 2 / E.M. van de VrieRelation algebras / Roger D. MadduxBoole's logic and probability : a critical exposition from the standpoint of contemporary algebra, logic and probability theory / [by] Theodore HailperinBoolean functions and equations / Sergiu RudeanuSchakelalgebra / H. Graham Flegg ; vertaald [uit het Engels] door A.J. ReerinkBoole's logic and probability : a critical exposition from the standpoint of contemporary algebra, logic and probability theory / Theodore Hailperin