- Author: John Leonard, Barry Lygo, Garry Procter
- Language: English
- Year: 2013
- Author: Leonard John, Lygo B., Procter Garry
- Language: English
- Year: 2013
- Author: John Leonard Barry Lygo Garry Procter
- Language: English
- Year: 2013
- Author: J. Leonard B. Lygo G. Procter
- Language: English
- Year: 1994
- Author: M. Casey J. Leonard B. Lygo G. Procter (auth.)
- Language: English
- Year: 1990
- Author: J Leonard, B Lygo, Garry Procter
- Language: English
- Year: 1995
- Author: J. Leonard B. Lygo G. Procter
- Language: English
- Year: 1994