First appeared in Astounding Science-Fiction, May 1941. Note that the stories clustering around "The Green Hills of Earth," all dealing with the settlement of the Solar System, are not on this chart; they were not conceived and written until six years later, after World War II.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| February 2010 |
|
The Future History of Robert Heinlein: Volume I | The Virginia Edition | Collection | viii |