| First published | 1957 |
|---|---|
| Publisher | Philosophical Library |
| Format | Hardcover |
| Type | Nonfiction |
| Pages | 227 |
| Price | $10.00 |
| Year | Reviewer | Publication |
|---|---|---|
| 1957 | Randall Garrett | Future Science Fiction, No. 1 |
| 1958 | Floyd C. Gale | Galaxy Science Fiction, February 1958 |
| First published | 1957 |
|---|---|
| Publisher | Philosophical Library |
| Format | Hardcover |
| Type | Nonfiction |
| Pages | 227 |
| Price | $10.00 |
| Year | Reviewer | Publication |
|---|---|---|
| 1957 | Randall Garrett | Future Science Fiction, No. 1 |
| 1958 | Floyd C. Gale | Galaxy Science Fiction, February 1958 |