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Roemer-1677.html
Roemer-1677.html
http://dbhs.wvusd.k12.ca.us/webdocs/Chem-History/Roemer-1677/Roemer-1677.html
Journal des sçavans
Speed of light
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Roemer-1677.html
http://dbhs.wvusd.k12.ca.us/webdocs/Chem-History/Roemer-1677/Roemer-1677.html