- Author: Robert L. Plummer, John Mark Terry
- Language: English
- Year: 2012
- Author: Adam J. Howell, Benjamin L. Merkle, Robert L. Plummer
- Language: English
- Year: 2020
- Author: Benjamin L. Merkle, Robert L. Plummer
- Language: English
- Year: 2017
- Author: Robert L. Plummer
- Language: Spanish
- Year: 2014
- Author: Elliott Irving Organick, Alexandra I Forsythe, Robert P Plummer
- Language: English
- Year: 1978
- Author: Elliott I. Organick Alexandra I. Forsythe Robert P. Plummer
- Language: English
- Year: 1978
- Author: Elliott I. Organick Alexandra I. Forsythe Robert P. Plummer
- Language: English
- Year: 1978