@article{104052,
      author = {Alasaarela, E. and Kaatra, K. and Marttunen, M. and  Muotka, J.},
      url = {http://digitallibrary.un.org/record/104052},
      title = {Ecosystems approach to water-level regulation : the  Oulujoki River system, northern Finland : case study /},
      publisher = {UN,},
      recid = {104052},
      pages = {12 p. :},
      address = {Geneva :. 1990-09-20},
      year = {1990},
      month = {Sep},
}