- Author: Robert J. Donovan
- Language: English
- Year: 1996
- Author: Helmut H. Telle Angel Gonzalez Urena Robert J. Donovan
- Language: English
- Year: 2007
- Author: Robert John Donovan
- Language: English
- Year: 1977
- Author: Helmut H. Telle Angel González Ureña Robert J. Donovan
- Language: English
- Year: 2007
- Author: Helmut H. Telle Angel González Ureña Robert J. Donovan
- Language: English
- Year: 2007