Note 9 — ON THE FOURFOLD ROOT OF THE PRINCIPLE OF SUFFICIENT REASON.
Karl Hillebrand translation
Die Welt a. W. u. V., vol. i. p. 22 et seqq., and vol. ii. chap. ii. of the second edition; vol. i. p. 22, § 6, and vol. ii. chap. ii. of the third edition.