︠I︡Ushkin, N. P., Romashkin, ︠. N., & Markova, G. A. (1982). Uralʹsko-Novozemelʹska︠i︡a fl︠i︡uoritonosna︠i︡a provin︠t︡si︠i︡a. "Nauka," Leningradskoe otd-nie.
Lua i Stíl Chicago (17ú heag.)︠I︡Ushkin, Nikolaĭ Pavlovich, ︠I︡U. N. Romashkin, agus G. A. Markova. Uralʹsko-Novozemelʹska︠i︡a Fl︠i︡uoritonosna︠i︡a Provin︠t︡si︠i︡a. Leningrad: "Nauka," Leningradskoe otd-nie, 1982.
Lua MLA (8ú heag.)︠I︡Ushkin, Nikolaĭ Pavlovich, et al. Uralʹsko-Novozemelʹska︠i︡a Fl︠i︡uoritonosna︠i︡a Provin︠t︡si︠i︡a. "Nauka," Leningradskoe otd-nie, 1982.
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