︠I︡Ushkin, N. P. (1980). Opyt srednemasshtabnoĭ topomineralogii: Paĭkhoĭsko-︠I︡Uzhnonovozemelʹska︠i︡a mineralogicheska︠i︡a provin︠t︡si︠i︡a. "Nauka," Leningradskoe otd-nie.
Citación estilo Chicago︠I︡Ushkin, Nikolaĭ Pavlovich. Opyt Srednemasshtabnoĭ Topomineralogii: Paĭkhoĭsko-︠I︡Uzhnonovozemelʹska︠i︡a Mineralogicheska︠i︡a Provin︠t︡si︠i︡a. Leningrad: "Nauka," Leningradskoe otd-nie, 1980.
Cita MLA︠I︡Ushkin, Nikolaĭ Pavlovich. Opyt Srednemasshtabnoĭ Topomineralogii: Paĭkhoĭsko-︠I︡Uzhnonovozemelʹska︠i︡a Mineralogicheska︠i︡a Provin︠t︡si︠i︡a. "Nauka," Leningradskoe otd-nie, 1980.
Warning: These citations may not always be 100% accurate.