*H Spencer Jones, "The Rotation of the Earth, and the Secular Accelerations of the Sun, Moon and Planets", in "Monthly Notes of the Royal Astronomical Society", vol.99 (1939), pp 541–558.
* H Spencer Jones, «The Rotation of the Earth, and the Secular Accelerations of the Sun, Moon and Planets», in "Monthly Notes of the Royal Astronomical Society", vol.99 (1939), pp 541—558.