@article{9198,
      author       = "Hein, Günter W. and Eissfeller, Bernd and IAG -
                      Gen.meeting, Edinburgh, August 3. - 12. 1989",
      title        = "Feasibility study on the Integration of GPS with a ring
                      Laser gyro Strapdown system  ",
      year         = "1989",
      note         = "Obr. a tab. - v textu",
}