* Brackenridge, J. Bruce. ''The Key to Newton's Dynamics: The Kepler Problem and the Principia: Containing an English Translation of Sections 1, 2, and 3 of Book One from the First (1687) Edition of Newton's Mathematical Principles of Natural Philosophy.'' U. of California Press, 1996. 299 pp. | * Brackenridge, J. Bruce. ''The Key to Newton's Dynamics: The Kepler Problem and the Principia: Containing an English Translation of Sections 1, 2, and 3 of Book One from the First (1687) Edition of Newton's Mathematical Principles of Natural Philosophy.'' U. of California Press, 1996. 299 pp. |