- Author: John S. Robertson
- Language: English
- Year: 2014
- Author: John M. Robertson
- Language: English
- Year: 2012
- Author: John G. Robertson, Andy Saunders
- Language: English
- Year: 2016
- Author: Hypatia Bradlaugh Bonner, John M. Robertson
- Language: English
- Year: 2014
- Author: John G. Robertson (author)
- Language: English
- Year: 2021
- Author: John Luke Robertson
- Language: English
- Year: 2016
- Author: John O. Robertson George V. Chilingar O. G. Sorokhtin N. O. Sorokhtin W. Long
- Language: English
- Year: 2018
- Author: Donald F. Elger Barbara A. LeBret Clayton T. Crowe John A. Robertson
- Language: English
- Year: 2016
- Author: Robert W. Blair John S. Robertson
- Language: Spanish
- Year: 1981