- Author: Robert B. Pippin
- Language: English
- Author: Robert B. Pippin
- Language: English
- Year: 2024
- Author: Robert B. Pippin
- Language: English
- Author: Robert B. Pippin
- Language: English
- Year: 2021
- Author: Robert B. Pippin
- Language: English
- Year: 2010
- Author: Robert B. Pippin
- Language: English
- Year: 2019
- Author: Robert B. Pippin
- Language: English
- Year: 2021
- Author: Robert B. Pippin
- Language: English
- Year: 2014
- Author: Robert B. Pippin
- Language: English
- Year: 2018
- Author: Robert B. Pippin
- Language: English
- Year: 2017