@article{802,
      author       = "Colombo, Oscar L. and Inter. Summer School on Satellite
                      Geodesy. Assisi, Italy, May 23 - June 3, 1988",
      title        = "Advanced techniques for high-resolution mapping of the
                      gravitational field. Basic techniques for gathering data on
                      a global basic  ",
      year         = "1988",
      note         = "3 obr. textu. - Liter.",
}