Methoden en technieken : [1e jaars reader] / Ernest Nagel e.a]The infinite in mathematics : logico-mathematical writings / Felix Kaufmann ; edited by Brian McGuinness ; with an introd. by Ernest Nagel ; translated from the German by Paul FoulkesHet neopositivisme in de sociale wetenschappen : analyse, kritiek, alternatieven / red. L.W. Nauta ; teksten van Ernest Nagel ... [et al.]