- Author: Robert Zemsky, Gregory R Wegner, Ann J. Duffield
- Language: English
- Year: 2018
- Author: Robert Zemsky, Gregory R Wegner, William F. Massy
- Language: English
- Year: 2005
- Author: Robert Zemsky, Gregory R. Wegner, Ann J. Duffield
- Language: English
- Year: 2018