- Author: Mark A. Sperling
- Language: English
- Year: 2014
- Author: Mark A. Sperling
- Language: English
- Year: 2008
- Author: Mark A. Sperling (Auth.)
- Language: English
- Year: 2014
- Author: Mark A. Sperling MD
- Language: English
- Year: 2008
- Author: Mark A. Sperling
- Language: English
- Year: 2001