Ėrmitazhnye chtenii︠a︡ : pami︠a︡ti B.B. Piotrovskogo (14.II.1908-15.X.1990) kratkoe soderzhanie dokladov. [nauchniĭ red. E.V. Zeĭmal]́
Zeĭmal ́, E. V .Evgeniĭ Vladislavovich Gosudarstvennyĭ Ėrmitazh .Russia 1993
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