@incollection{Bos2008IGS,
   title     = {Der Sperber in "S{\"u}dost Saarland"},
   author    = {Bos, Johan},
   booktitle = {Der Sperber in Deutschland},
   publisher = {Books on Demand GmbH},
   address   = {Norderstedt},
   pages     = {281--292},
   year      = {2008}
}