- Author: Richard von Mises
- Language: English
- Year: 1957
- Author: Jacob Viner
- Language: English
- Year: 1960
- Author: SODDY Frederick
- Language: English
- Year: 1925
- Author: Trevor Ling
- Language: English
- Year: 1979
- Author: Ivor Leclerc
- Language: English
- Year: 1972
- Author: Dürckheim Karlfried Graf von, (Trans. S. M. von Kospoth, E. R. Healey)
- Language: English
- Year: 1971
- Author: Raymond Firth B.S. Yamey
- Language: English
- Year: 1964