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- 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