@article{7563,
      author       = "King, Hele D. G. and XII Assemblée Génerale de l'UGGI a
                      Helsinki, 1960",
      title        = "The earth's gravitational potential, deduced from the
                      orbits of artificial satellites  ",
      year         = "1960",
      note         = "1 sv., 1 příl., A version for this paper is to be
                      submitted for publication in the Geophysical Journal of the
                      Royal Astronomical Society",
}