Columbia subject headings:
Arithmetic--Foundations.
Dedekind, Richard, 1831-1916.
Frege, Gottlob, 1848-1925.
Peano, Giuseppe, 1858-1932.
Harvard subject headings:
Arithmetic--Foundations
Dedekind, Richard, 1831-1916.
Frege, Gottlob, 1848-1925.
Peano, Giuseppe, 1858-1932.
Princeton subject headings:
Arithmetic--Foundations.
Dedekind, Richard, 1831-1916.
Frege, Gottlob, 1848-1925.
Mathematics--Philosophy.
Peano, Giuseppe, 1858-1932.