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"Nations, League of". Photo. Encyclopædia Britannica Online. Web. 20 Apr. 2017. https://www.britannica.com/topic/League-of-Nations?oasmId=92282
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"anti-Prohibition protest". Photo. Encyclopædia Britannica Online. Web. 20 Apr. 2017. https://www.britannica.com/event/Prohibition-United-States-history-1920-1933?oasmId=147196
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"Nineteenth Amendment: women casting their votes in New York City, c. 1920’s". Photo. Encyclopædia Britannica Online. Web. 20 Apr. 2017. https://www.britannica.com/topic/Nineteenth-Amendment?oasmId=122459
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"Winter Olympics: 1924 Games in Chamonix". Photo. Encyclopædia Britannica Online. Web. 20 Apr. 2017. https://www.britannica.com/place/Chamonix-Mont-Blanc?oasmId=76197
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"Fitzgerald, F. Scott". Photo. Encyclopædia Britannica Online. Web. 20 Apr. 2017. https://www.britannica.com/topic/The-Great-Gatsby?oasmId=10696
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"Pickford, Mary". Photo. Encyclopædia Britannica Online. Web. 20 Apr. 2017. https://www.britannica.com/topic/Academy-Award?oasmId=71415
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"New York Stock Exchange: crowds gathering on Black Thursday, 1929". Photo. Encyclopædia Britannica Online. Web. 20 Apr. 2017. https://www.britannica.com/event/stock-market-crash-of-1929?oasmId=157736
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"Great Depression: evicted sharecroppers along a road in southeastern Missouri, 1939". Photo. Encyclopædia Britannica Online. Web. 20 Apr. 2017. https://www.britannica.com/event/Great-Depression?oasmId=160749