- Author: Charles B. Higgins Albert de Roos MD
- Language: English
- Year: 2013
- Author: Charles B. Higgins Albert de Roos
- Language: English
- Year: 2006
- Author: Charles B Higgins, Albert de Roos
- Language: English
- Year: 2006
- Author: Charles B Higgins Albert de Roos
- Language: English
- Year: 2005