- Author: Gamma Erich, Helm Richard, Johnson Ralph, Vlissides John
- Language: English
- Year: 1994
- Author: Gamma Erich, Johnson Ralph, Vlissides John, Helm Richard
- Language: English
- Year: 1994
- Author: Gamma Erich, Helm Richard, Johnson Ralph, Vlissides John
- Language: English
- Year: 2000
- Author: Gamma Erich, Helm Richard, Johnson Ralph E., Vlissides John
- Language: English
- Year: 2016
- Author: Gamma Erich & johnson Ralph & Helm Richard & Vlissides john
- Language: Portuguese
- Year: 2000