Columbia subject headings:
Brumbaugh, Robert S. (Robert Sherrick), 1918-1992.
Education--Philosophy.
Philosophy--History.
Plato.
Time.
Harvard subject headings:
Brumbaugh, Robert S. (Robert Sherrick), 1918-1992.
Brumbaugh, Robert Sherrick, 1918-
Education--Philosophy
Philosophy--History
Plato
Time.
Princeton subject headings:
Brumbaugh, Robert S. (Robert Sherrick), 1918-1992.
Education--Philosophy.
Philosophy--History.
Plato.
Time.