@book{BuetowHerzigJahnetal.2000,
  author    = {B{\"u}tow, Heike and Herzig, Reinhard and Jahn, Gert and Markert, Wolfgang and Meißgeier, J{\"u}rgen and B{\"u}tow, Martin},
  title     = {Seydlitz Erdkunde 4 : Lehrerhandreichungen},
  publisher = {Schroedel},
  address   = {Hannover},
  pages     = {236 S.},
  year      = {2000},
  language  = {de}
}
@book{BricksBuetowBuetowetal.2000,
  author    = {Bricks, Wolfgang and B{\"u}tow, Heike and B{\"u}tow, Martin and Herzig, Reinhard and Morgeneyer, Frank and Untisz, M.},
  title     = {Seydlitz Geographie 10 : Arbeitsheft, Gymnasium Sachsen},
  publisher = {Schroedel},
  address   = {Hannover},
  isbn      = {3-507-52529-1},
  pages     = {32 S.},
  year      = {2000},
  language  = {de}
}