Columbia subject headings:
Bloch, Jan, 1836-1902.
Capitalists and financiers--Poland--Biography.
Poland--History--1863-1918.
Railroads--Poland--History.
Harvard subject headings:
Bloch, Jan, 1836-1902
Capitalists and financiers--Poland--Biography.
Poland--History--1864-1918
Railroads--Poland--History.
Princeton subject headings:
Bloch, Jan, 1836-1902.
Capitalists and financiers--Poland--Biography.