Simultaneously issued as hardcover and trade paperback. Both with identical dust jacket. Apart from binding and boards both editions are equal. They even share the same catalogue number.
The copyright is assigned for the year 1963 to the author.
The copyright of the translation is assigned for the year 1964 to the publisher; also, "1963" is on the copyright page.
Apparent first printing.
Month of publication from the schedule of Goldmanns Zukunftsromane in 1963 (one book per month).