Columbia subject headings:
Harvard subject headings:
Cossacks--Ukraine--History--17th century--Sources.
Harasymchuk, Vasylʹ, 1880-1944.
Historians--Ukraine--Biography
Ukraine--History--1648-1775--Sources.
Princeton subject headings:
Harasymchuk, Vasylʹ, 1880-1944.
Historians--Ukraine--Biography.
Poland--History--17th century--Sources.
Ukraine--History--1340-1648--Sources.
Ukraine--History--1648-1775--Sources.
Zaporozhians--History--Sources.