| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Lectures On Some of the Physical Properties of Soil | 978-1-146-17201-1 (1-146-17201-X) | 2010 |
| The Chemistry of the Farm | 978-1-144-12736-5 (1-144-12736-X) | 2010 |
Robert W. · Robert Waring · Robert Warnke · Robert Wearing · Robert Wernick