| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Notes On Gold Extraction by Means of Cyanide of Potassium : As Carried Out On the Witwatersrand Gold Fields, Transvaal, South Africa | 978-1-377-95848-4 (1-377-95848-5) | 2018 |
| Notes on Gold Extraction by Means of Cyanide of Potassium , as Carried out on the Witwatersrand Gold Fields, Transvaal, South Africa .. | 978-1-356-11469-6 (1-356-11469-5) | 2016 |