@book{id_13538, author = "Boedecker, Gerd and Richter, Bernd", title = "Das Schweregrundnetz 1976 der Bundesrepublik Deutschland", year = "1984", address = "München", publisher = "Beck", series = "DGK: Veröffentlichungen B: Angewandte Geodäsie", volume = "271", isbn = "3-7696-8560-1", }