Columbia subject headings:
Knowledge and learning.
Mann, Heinrich, 1871-1950--Knowledge and learning.
Mann, Thomas, 1875-1955--Knowledge and learning.
Teachers in literature.
Harvard subject headings:
Mann, Heinrich, 1871-1950--Knowledge--Education.
Mann, Thomas, 1875-1955--Knowledge--Education.
Teachers in literature
Princeton subject headings:
Mann, Heinrich, 1871-1950--Knowledge--Education.
Mann, Thomas, 1875-1955--Knowledge--Education.
Teachers in literature.