@techreport{BerloBierwirthSeifried2009,
  author    = {Berlo, Kurt and Bierwirth, Anja and Seifried, Dieter},
  title     = {100.000 Watt-Solar-Initiative f{\"u}r Schulen in NRW},
  institution = {Bundeszentrale f{\"u}r Politische Bildung},
  address   = {Bonn},
  year      = {2009},
  language  = {de}
}