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1.
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Philosophiæ Naturalis Principia Mathematica – Isaac Newton (English Translation) [pdf]
(docs.lib.noaa.gov)
4 points
lisper
9 years ago
3 comments
2.
▲
Death Valley – The Hottest Known Region [pdf]
(docs.lib.noaa.gov)
1 point
richrichie
2 years ago
2 comments