| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| A List of the Chief Memoirs on the Physics of Matter: Compiled By R.a. Lehfeldt Published Under the Direction of the Physical Society of London | 978-1-112-18411-6 (1-112-18411-2) | 2009 |
| Gold, Prices, and the Witwatersrand | 978-1-112-01572-4 (1-112-01572-8) | 2009 |