- Author: Edward Uhler Condon, University of Colorado (Boulder campus)
- Language: English
- Year: 1969
- Author: Werner Wolff
- Language: English
- Year: 1942
- Author: Christine Price
- Language: English
- Year: 1975
- Author: Giovanni Papini
- Language: English
- Year: 1948
- Author: Nazareno Padellaro, Michael Derrick (translator)
- Language: English
- Year: 1957
- Author: Kenneth Brooke James Forsyth
- Language: English, Русский
- Year: 1962
- Author: Reuben Levy tr
- Language: English
- Year: 1951
- Author: ʻUnṣur al-Maʻālī Kaykāvūs ibn Iskandar ibn Qābūs, Reuben Levy
- Language: English
- Year: 1951