- Author: Harvey Greg Smogur Zbigniew Helion
- Language: Polish
- Author: Harvey Greg
- Language: English
- Year: 2015
- Author: Harvey Greg
- Language: English
- Year: 2010
- Author: Harvey Greg
- Language: English
- Year: 2018
- Author: Harvey Greg
- Language: English
- Year: 2016
- Author: Harvey Greg
- Language: English
- Year: 2018
- Author: Harvey Greg
- Language: English
- Year: 2013
- Author: Harvey Greg, Leistra Hessel, Toolen Hans van ter
- Language: Dutch
- Year: 2016
- Author: Gearing Shane, Harvey Greg
- Language: English
- Year: 1991
- Author: Harvey Greg
- Language: English
- Year: 2016
