- Author: David Sim, Isabel Ridge
- Language: English
- Author: Polly Campbell
- Language: English
- Year: 2007
- Author: Akila Sankar McConnell
- Language: English
- Year: 2012
- Author: Gary Kempf
- Language: English
- Year: 2011
- Author: Heidi Glatfelter, David R. Craig
- Language: English
- Year: 2015
- Author: Jim Gregory
- Language: English
- Year: 2014
- Author: Jim Gregory
- Language: English
- Year: 2014
- Author: Harry Kollatz Jr
- Language: English
- Year: 2007
- Author: John Clayton
- Language: English
- Year: 2013
- Author: Norma Lewis
- Language: English
- Year: 2017