- Author: M. P. O. Burgers
- Language: English
- Year: 1957
- Author: M. R. Gavin J. E. Houldin
- Language: English
- Year: 1959
- Author: T. Grahame Bailey
- Language: English
- Year: 1962
- Author: Christopher Shackle
- Language: English
- Year: 1972
- Author: Marsack C. C.
- Language: English
- Year: 1962
- Author: Burgers M. P. O.
- Language: English
- Year: 1957
Old English
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- Author: Leslie Blakeley
- Language: English
- Year: 1978
- Author: Burns Snodgrass
- Language: English
- Year: 1955
- Author: S.H. Hollingdale
- Language: English
- Year: 1960