Variant relationship established by comparing The Best of John Russell Fearn: Volume One table of contents, which contains story subheadings, with an online scan of A Summons from Mars, which contains the same story subheadings.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| February 2016 |
|
The Best of John Russell Fearn: Volume One | Venture Press | Collection | 140 |