| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Engineer in South Africa: A Review of the Industrial, Situation in South Africa After the War and a Forecast of the Possibilities of the Country | 978-1-330-20014-8 (1-330-20014-4) | 2018 |
| The Engineer in South Africa: A Review of the Industrial Situation in South Africa After the War and a Forecast of the Possibilities of the Country | 978-1-297-95133-6 (1-297-95133-6) | 2015 |