
- Author: David Seyfort Ruegg
- Language: English
- Year: 1981

- Author: David Seyfort Ruegg
- Language: French
- Year: 1969

- Author: David Seyfort Ruegg
- Language: English
- Year: 2000

- Author: David Seyfort Ruegg Lambert Schmithausen (Editors)
- Language: English
- Year: 1990

- Author: David Seyfort Ruegg
- Language: English
- Year: 1981