This essay is exactly the same content in both printings, but the paragraphs are switched in position occasionally and capitalization of whole words and phrases in one printing is not done in the other printing. The author signature block is shifted into the essay body of one printing, while it remains at the bottom in the other printing. (Dragoondelight 20 Jan 2009).
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| December 1975 |
|
Perry Rhodan, #84: Secret Mission: Moluk | Ace Books | MAGAZINE | 166 |
| December 1975 |
|
Perry Rhodan #85: Enemy in the Dark | Ace Books | MAGAZINE | 198 |