Columbia subject headings:
Belief and doubt.
Pragmatism.
Ramsey, Frank Plumpton, 1903-1930.
Harvard subject headings:
Belief and doubt.
Pragmatism.
Ramsey, Frank Plumpton, 1903-1930.
Princeton subject headings:
Belief and doubt.
Pragmatism.
Ramsey, Frank Plumpton, 1903-1930.