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{{Bibliographic Record
|Title=The Principia : mathematical principles of natural philosophy
|Resource Type=book
|Author=Isaac Newton,
|Year=1999
|Abstract=Isaac Newton ; a new translation by I. Bernard Cohen and Anne Whitman, assisted by Julia Budenz ; preceded by a guide to Newton's Principia by I. Bernard Cohen.
|Publisher=University of California Press
|ISBN=0520088166
}}