Columbia subject headings:
Harvard subject headings:
Merchants--Russia--Biography.
Philanthropists--Russia--Biography.
Ushakov family.
Ushakov, Abram Abramovich, 1863-1933.
Ushakov, Abram Mikhaĭlovich, 1825-1917.
Princeton subject headings:
Capitalists and financiers--Russia--Biography.
Ushakov family.