@book{UBHD-1046440, author={Kudrjavcev, Fedor F.}, title={Zolotoe kol'co}, publisher={Izdat. "Avrora"}, address={Leningrad}, year={1974}, pages={227 S.}, note={Text in engl. u. russ. Spr}, library={UB [Signatur: 75 B 2042]}, }