“ There is only one real world, with one past and one future. ”
Robert A. Heinlein, The Door Into Summer (1957). copy citation
| Author | Robert A. Heinlein |
|---|---|
| Source | The Door Into Summer |
| Topic | past future |
| Date | 1957 |
| Language | English |
| Reference | |
| Note | |
| Weblink |
