@book{BeerSurkusKocher2012,
  author    = {Frank Beer and Bertil Surkus and Birgit Kocher},
  title     = {Stoffeintrag in Stra{\"s}enrandb{\"o}den - Messzeitraum 2008/2009},
  isbn      = {978-3-86918-155-4},
  year      = {2012},
}