A soil and irrigability survey of the lower Usutu Basin (south) in the Swaziland Lowveld; memoir and maps,
by G. Murdoch and J. P. Andriesse.
- London, H.M. Stationery Off., 1964.
- Dept. of Technical Co-operation. Overseas research publication no. 3 .
- Great Britain. Dept. of Technical Co-operation. Overseas research publication ; Great Britain. Dept. of Technical Co-operation. Overseas research publication ; Great Britain. Dept. of Technical Co-operation. Overseas research publication ; no. 3 .