@article{20330,
      author       = "Wahlsten, G.",
      title        = "Nivamätningsorgan  ",
      year         = "1979",
      note         = "1 sv., 77 07 481-3., G 01 C 5/04, G 01 F 23/26., 29.6.1977,
                      30.12.1978., Djursholm, SE",
}