@book{Belting1992,
  author    = {Belting, Theodor},
  title     = {Blockheizkraftwerke},
  edition   = {1. Aufl.},
  publisher = {Verl. T{\"U}V Rheinland},
  address   = {K{\"o}ln},
  isbn      = {3-88585-940-8},
  pages     = {80 S. : graph. Darst.},
  year      = {1992},
  language  = {de}
}
@book{Belting1995,
  author    = {Belting, Theodor},
  title     = {Blockheizkraftwerke},
  edition   = {3. Aufl.},
  publisher = {Verl. T{\"U}V Rheinland},
  address   = {K{\"o}ln},
  isbn      = {3-88585-940-8},
  pages     = {80 S. : graph. Darst.},
  year      = {1995},
  language  = {de}
}