Wirkungsdaten 1968-, Prof. of Philosophy
1948 - , Assoc. Prof. of Philosophy; Brigham Young Univ.
1937 - , Prof. of Philosophy and Religious Studies at the Univ. of Colorado; Boulder
1965 - , Assoc. Prof. of Philosophy; Univ. College Dublin; Ireland
1942 - , Ass. prof. of philosophy
1916 - 1985, Prof. of philosophy; Michigan State Univ. (1991)