Mathematical Principles of Natural Philosophy (or, the Principia)
			(pub. 1687)
			
Etexts:
- Web viewer (plus multiple downloadable formats) at Archive.org (Translated by Andrew Motte)
 
Available at Amazon.com:
This site earns a commission on purchases made via these links
- Paperback edition, translated by Andrew Motte (Prometheus, 1995, 465 pg).
 
All links verified on or after September 17, 2020