@article{1231,
      author       = "Arnold, K. and XIV. Val.shromáždění MUGG, Lucerne,
                      25.9. - 7.10. 1967",
      title        = "An Attempt to determine the unknown Parts of the Earth´s
                      Gravity Field by successive Satellite Passages  ",
      year         = "1967",
      note         = "3 x 1 seš.",
}