Paperback
details (Italy).
(see also: Copertina flessibile)
details (Spain - España).
(see also: Tapa blanda)
ISBN: 978-0-586-02929-9
ISBN-10: 0-586-02929-X
Grafton · 1969
| See also: | ||
| 1986 | Mass Market Paperback | Asimov's Mysteries |
| 1968 | Hardcover | Asimov's Mysteries |