Freeman Bibliographical Database
| Identifier: | A29 |
| Date: | 1852 |
| Concise reference: | Spencer, Herbert. 1890 [1852]. The Development Hypothesis. Essays Scientific, Political & Speculative. 3 vols. London: Williams and Norgate. pp.1-7. |
| Identifier: | A29 |
| Date: | 1852 |
| Concise reference: | Spencer, Herbert. 1890 [1852]. The Development Hypothesis. Essays Scientific, Political & Speculative. 3 vols. London: Williams and Norgate. pp.1-7. |