Columbia subject headings:
Harvard subject headings:
Frege, Gottlob, 1848-1925--Knowledge--Mathematics.
Wismar (Germany)--Intellectual life.
Princeton subject headings:
College teachers--Germany--Jena--Biography.
Frege, Gottlob, 1848-1925--Influence.
Frege, Gottlob, 1848-1925.
Jena (Germany)--History.
Philosophers--Germany--19th century--Biography.
Philosophers--Germany--20th century--Biography.