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	1.	No cover image available First Principles/ By Herbert Spencer by Spencer, Herbert [author.] Series: A System of Synthetic Philosophy ; Vol. I Edition: 5th ed. Material type: Text; Format: print ; Literary form: Not fiction Language: English Publisher: London: Williams & Norgate, 1898 Other title: A System of Philosophy Availability: Items available for reference: NIH Library: Not for loan (1)Call number: WZ112.5.83 H531 1898. Add to cart (remove)
	2.	No cover image available The Principles of Biology/ By Herbert Spencer Vol. I by Spencer, Herbert [author.] Edition: Rev. and enl. ed. Material type: Text; Format: print ; Literary form: Not fiction Language: English Publisher: London: Williams and Norgate, 1898 Other title: A System of Philosophy Availability: Items available for reference: NIH Library: Not for loan (1)Call number: WZ112.5.83 H531 1898. Add to cart (remove)
	3.	No cover image available The Principles of Psychology/ by Herbert Spence Vol. II. by Spencer, Herbert [author.] Edition: Fourth Edition. (Fifth Thousand) Material type: Text; Format: print ; Literary form: Not fiction Language: English Publisher: London: Williams and Norgate, 1899 Other title: A System of Philosophy Availability: Items available for reference: NIH Library: Not for loan (1)Call number: BF110 H531 1899. Add to cart (remove)

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