| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Essential Oils: Individual Essential Oils of the Plant Families | 978-0-88275-163-4 (0-88275-163-8) | 1974 |
| The Essential Oils, Vol. 1: History, Origin in Plants, Production, Analysis | 978-0-88275-073-6 (0-88275-073-9) | 1972 |
| The Essential Oils, Vol. 2: The Constituents of Essential Oils | 978-0-88275-338-6 (0-88275-338-X) | 1975 |