@book{Niedermayer2017, author = {Niedermayer, Oskar}, year = {2017}, language = {ger}, copyright = {http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen}, title = {Parteimitglieder in Deutschland: Version 2017}, url = "http://dx.doi.org/10.17169/refubium-25183", }