Columbia subject headings:
Harvard subject headings:
Frege, Gottlob, 1848-1925--Criticism and interpretation.
Frege, Gottlob, 1848-1925.
Frege, Gottlob, 1848-1925. Grundgesetze der Arithmetik.
Frege, Gottlob, 1848-1925. Logische Untersuchungen.
Logic, Symbolic and mathematical.
Logic--Philosophy.
Logic.
Princeton subject headings:
Frege, Gottlob, 1848-1925--Criticism and interpretation.
Logic, Symbolic and mathematical.
Logic--Philosophy.