| Two Essays by Arthur Schopenhauer. I. On the fourfold root of the principle of sufficient reason. II On the will in nature. A literal translation. SCHOPENHAUER, Arthur / Used - Hardcover | Celsus Books, PBFA. | 1st Edition | $897.82 |
| On the Fourfold Root of the Principle of Sufficient Reason and Other Writings Schopenhauer, Arthur; Cartwright, David E. (EDT); Erdmann, Edward E. (EDT); Janaway, Christopher (EDT) / Used - Hardcover | GreatBookPrices | As new | $313.71 |
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| Schopenhauer: On the Fourfold Root of the Principle of Sufficient Reason and Other Writings (The Cambridge Edition of the Works of Schopenhauer) Schopenhauer, Arthur / Used - Hardcover | Mispah books | As new | $282.57 |
| On the fourfold root of the principle of sufficient reason (The Open Court library of philosophy) Schopenhauer, Arthur / Used - Hardcover | Mispah books | Dust Jacket | $232.46 |
| On the Fourfold Root of the Principle of Sufficient Reason Schopenhauer, Arthur / Used - Hardcover | True Oak Books | 1st Edition | $150.00 |
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| On the fourfold root of the principle of sufficient reason (The Open Court library of philosophy) Arthur Schopenhauer / Used - Hardcover | ThriftBooks-Atlanta | Dust Jacket | $73.50 |
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| On the Fourfold Root of the Principle of Sufficient Reason and on the Will in Nature Schopenhauer, Arthur / Used - Hardcover | GreatBookPrices | As new | $58.24 |