- Author: SODDY Frederick
- Language: English
- Year: 1925
- Author: Ivor Leclerc
- Language: English
- Year: 1972
- Author: Gullermo Morón
- Language: English
- Year: 1964
- Author: Bernard Semmel
- Language: English
- Year: 1960
- Author: Cedric Oliver Evans
- Language: English
- Year: 1970
- Author: Ernst Troeltsch
- Language: English
- Year: 1931
- Author: Ernst Troeltsch
- Language: English
- Year: 1931
Rhythm
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- Author: Elsie Fogerty
- Language: English
- Year: 1936
- Author: H. P. Adams
- Language: English
- Year: 1940