- Open Directory World: Deutsch: Gesellschaft: Geschichte: Nach Zeitabschnitten: Neuzeit: 20. Jahrhundert: Nationalsozialismus
- Open Directory Society: History: By Time Period: Twentieth Century: Holocaust
- Open Directory Society: History: By Region: Europe: Germany: Third Reich
- Open Directory Society: Issues: Race-Ethnic-Religious Relations: Holocaust Denial
- Open Directory Society: Issues: Race-Ethnic-Religious Relations: Hate
- Open Directory Society: Issues: Race-Ethnic-Religious Relations: Race and Racism: Supremacy and Separatism: White