@book{Niedermayer2020,
author = {Niedermayer, Oskar},
year = {2020},
language = {ger},
copyright = {http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen},
title = {Parteimitglieder in Deutschland: Version 2020},
url = "http://dx.doi.org/10.17169/refubium-27714",
}