Columbia subject headings:
Croghan, George, 1720?-1782.
Frontier and pioneer life--Ohio River Valley.
Indians of North America--Ohio River Valley.
Pennsylvania--History--Colonial period, ca. 1600-1775.
Harvard subject headings:
Croghan, George, -1782.
Frontier and pioneer life--Ohio River Valley
Indians of North America--Ohio River Valley.
Pennsylvania--History--Colonial period, ca. 1600-1775.
Princeton subject headings:
Croghan, George, -1782.
Frontier and pioneer life--Ohio River Valley.
Indians of North America--Commerce.
Indians of North America--Ohio River Valley.
Pennsylvania--History--Colonial period, ca. 1600-1775.