Paperback
details (USA).
details (Italy).(see also: Copertina flessibile)
details (Spain - España).(see also: Tapa blanda)
details (Japan).(see also: ペーパーバック)
ISBN: 978-0-385-09210-4
ISBN-10: 0-385-09210-5
Doubleday / Anchor Books · 1956