Weeder, J. |
The 14-monthly period of the motion of the pole of the Earth from determinations of the azimuth of the meridian marks of the Leiden observatory from 1882-1896 / by J. Weeder |
[S.l. : s.n., 1900?] |
Weeder, J. |
Calculations concerning the central line of the Solar eclipse of April the 17th, 1912 in the Netherlands / by J. Weeder |
[S.l. : s.n., 1912?] |