Columbia subject headings:
Harvard subject headings:
Hyndman, H. M. (Henry Mayers), 1842-1921
Socialism--Great Britain--19th century.
Socialism--Great Britain--20th century.
Socialism--Great Britain--History--19th century
Socialism--Great Britain--History--20th century
Socialists--Great Britain--Biography
Princeton subject headings:
Hyndman, H. M. (Henry Mayers), 1842-1921.
Socialism--Great Britain--History--19th century.
Socialism--Great Britain--History--20th century.
Socialists--Great Britain--Biography.