@book{id_13505,
author = "Torge, Wolfgang and Weber, Georg and Wenzel, Hans-Georg",
title = "Determination of 12' x 20' mean free air gravity",
year = "1980",
address = "München",
publisher = "Beck",
series = "DGK: Veröffentlichungen B: Angewandte Geodäsie",
volume = "247",
isbn = "3-7696-8541-5",
}