
- Author: Robert W. Berger
- Language: English
- Year: 1969

- Author: Robert W. Berger
- Language: English
- Year: 1990

- Author: Robert E. Berger
- Language: English
- Year: 2014

- Author: Robert E. Berger
- Language: English
- Year: 2014

- Author: Robert W. Berger
- Language: English
- Year: 1997

- Author: Robert J. Berger
- Language: English
- Year: 1985