Columbia subject headings:
Harris, Errol E.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Logic.
Philosophy.
Harvard subject headings:
Harris, Errol E.
Hegel, Georg Wilhelm Friedrich, 1770-1831
Hegel, Georg Wilhelm Friedrich, 1770-1831--Contributions in logic.
Philosophy.
Princeton subject headings:
Harris, Errol E.
Hegel, Georg Wilhelm Friedrich, 1770-1831--Contributions in logic.
Philosophy.