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An essay on the principles of human action and some remarks on the systems of Hartley and Helvetius
- "Criticism, interpretation, etc"@en
- "An essay on the principles of human action and some remarks on the systems of Hartley and Helvetius"
- "An essay on the principles of human action and some remarks on the systems of Hartley and Helvetius"@en
- "An essay on the principles of human action, and some remarks on the systems of Hartley and Helvetius"
- "An essay on the principles of human action and some remarks on the systems of Hartley and Helvetius : a facsimile reproduction"@en