Columbia subject headings:
Harvard subject headings:
Euler's numbers--History--18th century.
Euler, Leonhard, 1707-1783.
Mathematics--History--18th century.
Numeration--History--18th century.
Princeton subject headings:
Euler's numbers--History--18th century.
Euler, Leonhard, 1707-1783.
Mathematics--History--18th century.
Numeration--History--18th century.