@book{ BB21296052,
author = "Graf, Oskar Maria and Tretʹi︠a︡kov, Sergeĭ Mikhaĭlovich",
title = "Reise in die Sowjetunion 1934",
publisher = "Luchterhand Literaturverlag",
year = "1992",
series = "Sammlung Luchterhand",
number = "1012",
URL = "https://ci.nii.ac.jp/ncid/BB21296052"
}