https://libgen.is/book/index.php?md5=73E80A912A58C8879F390CBCFAFBA2ED
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-Kenneth R. Westphal, How Hume and Kant Reconstruct Natural Law. Justifying Strict Objectivity without Debating Moral Realism,
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-Kenneth R. Westphal, How Hume and Kant Reconstruct Natural Law. Justifying Strict Objectivity without Debating Moral Realism,