|Identifying Codes|| |
|Publication Location||Kraków, Poland|
|Notes||4th book of the "Stanisław Lem Dzieła" series. |
This version has embossed hardback, purple cover and 30th anniversary logo of the Wydawnictwo Literackie (founded in 1953).
Similar version has a different red cover.
Also issued with grey cover.
© Copyright by Stanisław Lem, Kraków 1961.