Columbia subject headings:
Harvard subject headings:
Intelligence officers--Poland--Biography.
Military intelligence--Poland--History--20th century.
Soldiers--Poland--Biography
Żychoń, Jan Henryk, 1902-1944--Trials, litigation, etc.
Princeton subject headings:
Intelligence officers--Poland--Biography.
Military intelligence--Poland--History--20th century.
Soldiers--Poland--Biography.
Żychoń, Jan Henryk, 1902-1944--Trials, litigation, etc.