Walter Bagehot (1873). “Physics and Politics: Or, Thoughts on the Application of the Principles of "natural Selection" and "inheritance" to Political Society”, p.75
Walter Bagehot (1873). “Physics and Politics: Or, Thoughts on the Application of the Principles of "natural Selection" and "inheritance" to Political Society”, p.63
Walter Bagehot (1999). “Physics and Politics, Or, Thoughts on the Application of the Principles of "natural Selection" and "inheritance" to Political Society”, Ivan R Dee