@article{7357,
      author       = "Grossi, Mario D. and Gay, Ray H.",
      title        = "Doppler Measurements of the Ionosphere on the Occasion of
                      the Apollo-Soyuz Test Project. Part I: Computer Simulation
                      of Ionospheric - Induced Doppler Shifts  ",
      year         = "1975",
      note         = "2x1 sv., příl. The Model of the Summer 1975 Ionosphere",
}