Columbia subject headings:
Brown, Ernest W. (Ernest William), 1866-1938.
Hill, George William, 1838-1914.
Lunar theory.
Moon--Orbit.
Harvard subject headings:
Astronomy
Lunar theory.
Mathematics
Mathematics_$xHistory.
Moon.
Princeton subject headings:
Brown, Ernest W. (Ernest William), 1866-1938.
Hill, George William, 1838-1914.
Lunar theory.
Moon--Orbit.