Moscow: Progress Publishers, 1969. Paperback. First printing of the Englished versions. Small softback, the size of a mass market production but better-produced, 286p., alkaline paperstock decorated with a few excellent woodcut images, cover-wrap is slightly acidic and has toned a little (a lot, on spine panel), mildest edgewear, a good, sound, clean, unmarked copy.
FYI, book's title is derived from the very last story here, by Mykolas Sluckis.