William James Sidis and his Browning - HUB History: Boston history
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Sidis selfie with his Brownie (source)
The Amazing Story of Genius William James Sidis - HubPages
William James Sidis - Geniuses
William James Sidis (1898-1944) - Mémorial Find a Grave
Bio of William Sidis
Sidis Archives
Bedouins Project Gutenberg
The Amazing Story of Genius William James Sidis - HubPages
William James Sidis: the Tragic Story of the Smartest Person Ever Lived - Learning Mind
Boston Herald, May 4,1919
The Amazing Story of Genius William James Sidis - HubPages
Bedouins Project Gutenberg
Boy Wonder Arrested as Ringleader when Reds Riot in Roxbury (episode 221) - HUB History: Boston history podcast
Bedouins Project Gutenberg
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