First Principles Spencer

Independently published

First Principles                                

Double 9 Books

First Principles Part I The Unknowable          

Independently published

FIRST PRINCIPLES: A Classic Exploration of the Unknown Force Behind Science, Religion, and Reality

Independently published

First Principles of a New System of Philosophy  

Double 9 Books

First Principles Part II Laws Of The Knowable    

First Principles by Herbert Spencer(2000-12-04)  

Cornell University Library

First Principles: 2d Impression (1908)          

Williams & Norgate

First Principles, Vol. II (A System of Synthetic Philosophy, Vol. I. Ii.)

University Press of the Pacific

First Principles                                

Nabu Press

Synthetic Philosophy ...: First Principles. 1920. [v.2-3] The Principles Of Biology. V.1, Rev. & Enl. Ed., 1921