| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Hetas Guide to Approved Solid Fuel, Wood and Biomass Products and Services 2017 | 978-O-9928288-3-7 (O-9928288-3-X) | 2017 |
A.C. · A. Clark · A. R. · A. Russell · R. C. · R. Clark · Russell C · Russell Clark