Notes: Not dated, assumed circa late 1950s. Reginald1 tentatively dates it as "1959?". Bleiler, below, and OCLC 977475769 give a more definitive 1959 date, OCLC 5959664 adds that the book is only 17cm tall (the size of an old Ace double), was translated from the Russian by L. Kolesnikov and edited by R. Dixon.