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Erica Faccioli has written:
'Nikolaj Michajlovic Foregger (1892-1939)' -- subject(s): Criticism and interpretation
Nikolai Dupak's birth name is Nikolai Lukyanovitch Dupak.
Nikolai Kovalsky's birth name is Kovalsky, Nikolai Petrovich.
Nikolai Kozlovsky's birth name is Kozlovsky, Nikolai Feofanovich.
Nikolai Kulchitsky's birth name is Kulchitsky, Nikolai Leonidovich.