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First principles of a new system of philosophy.

APA Citation

Spencer, H. (1869). First principles of a new system of philosophy. 2d ed. New York: D. Appleton and company.

Spencer, Herbert, 1820-1903. First Principles of a New System of Philosophy. 2d ed. New York: D. Appleton and company, 1869.

Warning: These citations may not always be complete (especially for serials).