. . . . . . . "Sixty letters about the Soviet Union"@en . . "60 letters foreign workers write of their life and work in the USSR" . "60 letters; foreign workers write of their life and work in the U.S.S.R" . "Sixty letters" . . . . . . "60 letters foreign workers write of their life and work in the U.S.S.R"@en . . . .