Early writings in the philosophy of logic and mathematics / Edmund Husserl ; transl. [from the German] by Dallas WillardPhilosophy of arithmetic : psychological and logical investigations with supplementary texts from 1887-1901 / Edmund Husserl ; transl. [from the German] by Dallas WillardPhilosophy of arithmetic : psychological and logical investigations with supplementary texts from 1887-1901 / Edmund Husserl ; transl. [from the German] by Dallas Willard