- Author: W. Edwin Clark
- Language: English
- Author: W. Edwin Clark
- Language: English
- Author: Pier Cesare Bori David Ward
- Language: English
- Year: 1991
- Author: Mayer I. Gruber
- Language: English
- Year: 1992
- Author: W. Edwin Clark
- Language: English
- Year: 2001
- Author: Wilson Mary E.
- Language: English
- Year: 2009