MERIT newsletter.
International Astronomical Union.
International Union of Geodesy and Geophysics.
Joint Working Group on the Rotation of the Earth.
Hailsham : IAU/IUGG Joint Working Group on the Rotation of the Earth,
1979-1985.
Description based on: No. 3 (Mar. 1981).
Organ of the International Astronomical Union and International Union of Geodesy and Geophysics.
MERIT