- Author: Armstrong Helen
- Language: English
- Year: 2009
- Author: Joseph-Armstrong Helen
- Language: English
- Year: 2014
- Author: Armstrong Helen
- Language: English
- Year: 2016
- Author: Armstrong Helen Joseph
- Language: English
- Year: 2014
- Author: Armstrong Helen L., Johnson Anthony N., McCulloh Ian A
- Language: English
- Year: 2013
- Author: Armstrong Helen
- Language: English
- Year: 2016
- Author: Natalie Armstrong Helen Eborall
- Language: English
- Year: 2012
- Author: Michael Armstrong Helen Murlis
- Language: English
- Year: 2005
- Author: Michael Armstrong Helen Murlis
- Language: English
- Year: 2009