ISBN: 978-1-4156-5909-0
ISBN-10: 1-4156-5909-5
Digest Productions Corp. ยท 1959
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ISBN: 978-1-4156-5909-0 ISBN-10: 1-4156-5909-5 Digest Productions Corp. ยท 1959 |
| See also (possibly by other authors): | ||
| 1961 | Single Issue Magazine | IF Worlds of Science Fiction, September 1961 (Volume 11, No. 4) |
| 1960 | Paperback | IF Worlds of Science Fiction, September 1960 (Volume 10, No. 4) |