@article{27416,
      author       = "Haojian, Feng and 19.FIG Congress, Helsinki, 10.-19.6.1990",
      title        = "Research Report on the Extensive Test of EDM Trigonometrric
                      Leveling in Zhuhai Area of China  ",
      year         = "1990",
      note         = "Liter. - Obr. a tab.",
}