- Author: Colin Bayliss Brian Hardy
- Language: English
- Year: 2007
- Author: Mary Hardy
- Language: English
- Year: 2003
- Author: Willi-Hans Steeb Yorick Hardy Alexandre Hardy Ruedi Stoop
- Language: English
- Year: 2004
- Author: G. H. Hardy
- Language: English
- Year: 1992
- Author: Kenneth S. Williams Kenneth Hardy
- Language: English
- Year: 2010
- Author: G. H Hardy
- Language: English
- Year: 1954
- Author: Kenneth Hardy Kenneth S. Williams
- Language: English
- Year: 1997
- Author: Hardy G. H.
- Language: English
- Year: 1921
- Author: G. H. & Wright E. M. Hardy
- Language: English
- Year: 1975