@article{43628,
      author       = "International Course Lasers in Surveying and Construction,
                      Stockholm 1973",
      title        = "Use of Laser in Precision Levelling",
      note         = "S. 370 - 382, tab. a obr. v textu, cena 10,-  1972. -
                      Reprinted from The Canadian Surveyor, Vol. 26, No 4.,
                      September 1972",
}