Columbia subject headings:
Richards, I. A. (Ivor Armstrong), 1893-1979--Bibliography.
Richards, I. A. (Ivor Armstrong), 1893-1979.
Harvard subject headings:
Richards, I. A. (Ivor Armstrong), 1893-1979--Bibliography.
Richards, I. A. (Ivor Armstrong), 1893-1979.
Princeton subject headings:
Richards, I. A. (Ivor Armstrong), 1893-1979--Bibliography.
Richards, I. A. (Ivor Armstrong), 1893-1979.