Columbia subject headings:
Harvard subject headings:
Sakai, Toshihiko, 1870-1933
Socialists--Japan--Biography
Yamakawa, Hitoshi, 1880-1958.
Princeton subject headings:
Sakai, Toshihiko, 1870-1933.
Socialists--Japan--Biography.
Yamakawa, Hitoshi, 1880-1958.