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What Happened on April 20, 1889 - On This Day
What Does 4/20 Have To Do With Adolf Hitler? - Heavy.com
Adolf Hitler - HistoryNet
Adolf Hitler - Wikipedia
Adolf Hitler: Early Years, 1889–1913 | Holocaust Encyclopedia
Adolf Hitler: Key Dates | Holocaust Encyclopedia
The bloody history of April 20: Mass murders, a ‘fake news’ war …
April 20, 1889: Adolf Hitler, Letter-Writer to ‘The Nation’, Is Born
The History Place - Rise of Hitler: Adolf Hitler is Born
On This Day: April 20 - The New York Times