Empiricism and sociology / Otto Neurath ; ed. by Marie Neurath and Robert Cohen ; [transl. from the German by Paul Foulkes ... et al.]Theoretical physics and philosophical problems : selected writings / Ludwig Boltzmann ; ed. by Brian McGuinness ; with a forew. by S.R. de Groot ; [transl. from the German by Paul Foulkes]Knowledge and error : sketches on the psychology of enquiry / Ernst Mach ; with an introd. by Erwin N. Hiebert ; [translation from the German by Thomas J. McCormack and Paul Foulkes ; editor, Brian McGuinness]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 FoulkesProlegomena to a critical grammar / [by] Josef Schächter ; foreword by J.F. Staal ; [translated from the German by Paul Foulkes]