By Michael L. Peterson
By Henry Fairlie, Vint Lawrence
By Marilyn McCord Adams
By Schoeck, R.J.
By Helen Alford, Michael Naughton
By Zachman, Randall C.
By Artin, Emil
By Ralph McInerny
By Henri Bergson
By Saint Thomas Aquinas, A.C. Pegis, etc.
By Saint Thomas Aquinas, Vernon J. Bourke
By Thomas Aquinas, Anton C. Pegis, F.R.S.C.
By Aquinas Thomas