
Source: De architectura (The Ten Books On Architecture) (~ 15BC), Book I, Chapter IV, Sec. 6
Book 2, Ch. 3 (translation by Mansfield and Tarcov)
Discourses on Livy (1517)
Source: De architectura (The Ten Books On Architecture) (~ 15BC), Book I, Chapter IV, Sec. 6
In the Belly of the Beast (1981)
The Structure of the Universe: An Introduction to Cosmology (1949)
Source: The Subversion of Christianity (1984), p. 21
Quoted by Lawrence W. Baker in Animal Rights and Welfare: A Documentary and Reference Guide (2015), p. 38.
The Other World (1657)