Secular Four

Four Paths To Jerusalem: Jewish, Christian, Muslim, And Secular Pilgrimages, 1000 Bce To 2001 Ce

The Secular Variations Of The Elements Of The Orbits Of The Four Inner Planets Computed For The Epoch 1850. O.G. M.T.

The Secular Variations Of The Elements Of The Orbits Of The Four Inner Planets Computed For The Epoch 1850, G.M.T. (1912)