Vseso︠i︡uznoe mineralogicheskoe obshchestvo, ︠I︡Ushkin, N. P., & Marin, ︠. B. (1990). Mineralogicheskoe kartirovanie i indikatory orudeneni︠i︡a: Sbornik nauchnykh trudov. "Nauka," Leningradskoe otd-nie.
Dyfyniad Arddull ChicagoVseso︠i︡uznoe mineralogicheskoe obshchestvo, Nikolaĭ Pavlovich ︠I︡Ushkin, and ︠I︡U. B. Marin. Mineralogicheskoe Kartirovanie I Indikatory Orudeneni︠i︡a: Sbornik Nauchnykh Trudov. Leningrad: "Nauka," Leningradskoe otd-nie, 1990.
Dyfyniad MLAVseso︠i︡uznoe mineralogicheskoe obshchestvo, et al. Mineralogicheskoe Kartirovanie I Indikatory Orudeneni︠i︡a: Sbornik Nauchnykh Trudov. "Nauka," Leningradskoe otd-nie, 1990.
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