Carrying on when president cannot: exhibition raises questions about details in transfer of power.
Janofsky
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D006233:Persons with Disabilities / Q000266:history; D006076:Government; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007878:Legislation as Topic / Q000266:history; D014481:United States