- Author: Omero Manuel Fernandez-Galiano Alfred Heubeck G. Aurelio Privitera
- Language: Italian
- Year: 1990
- Author: Omero Alfred Heubeck G. Aurelio Privitera
- Language: Italian
- Year: 1988
- Author: Omero Alfred Heubeck Stephanie West G. Aurelio Privitera
- Language: Italian
- Year: 1988
- Author: Joseph Russo Manuel Fernandez-Galiano Alfred Heubeck
- Language: English
- Year: 1993
- Author: Alfred Heubeck Arie Hoekstra
- Language: English
- Year: 1989
- Author: Alfred Heubeck Arie Hoekstra
- Language: English
- Year: 1990
- Author: Alfred Heubeck, Stephanie West, John Bryan Hainsworth, A. Hoekstra
- Language: English
- Year: 1990