Powers has three different covers for The Time Machine. This record collects all the publications without cover images. As the correct image is determined, the pub should be moved to the applicable cover art record.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| January 1960 | The Time Machine | Berkley Books | Chapbook | ||
| March 1960 | The Time Machine | Berkley Books | Chapbook | ||
| November 1960 | The Time Machine | Berkley Medallion | Chapbook | ||
| March 1961 | The Time Machine | Berkley Medallion | Chapbook | ||
| August 1961 | The Time Machine | Berkley Medallion | Chapbook | ||
| January 1963 | The Time Machine | Berkley Highland | Chapbook | ||
| May 1963 | The Time Machine | Berkley Highland | Chapbook | ||
| October 1963 | The Time Machine | Berkley Highland | Chapbook | ||
| April 1964 | The Time Machine | Berkley Highland | Chapbook | ||
| November 1964 | The Time Machine | Berkley Highland | Chapbook | ||
| February 1969 | The Time Machine | Berkley Highland | Chapbook | ||
| February 1969 | The Time Machine | Berkley Highland | Chapbook |