1. V. S. Dillon, ‘Assay Practice on the Witwatersrand’, Transvaal and Orange Free State Chamber of Mines, Johannesburg, 1955
2. ‘Analysis of Cyanidation Solutions and Gold Precipitate’, Imperial Chemical Industries, London, 1963
3. ‘Scott’s Standard Methods of Chemical Analysis’, edited by N. H. Furman, 6th edition, Vol. 1, Van Nostrand, Princeton, 1962
4. I. M. Kolthoff and P. J. Giving, ‘Treatise on Analytical Chemistry’, Part 11, Vol. 4, Interscience, New York, 1966
5. R. S. Young, ‘Chemical Analysis in Extractive Metallurgy’, Charles Griffin, London, 1971