Nikolai Nikolayevich EVREINOV (1879-1953) What is Theatre, a children's book illustrated by Sergei Vasilyevich CHEKHONIN (1878- 1936) and Vladimir Alexeyevich MILACHEVSKI (1893-1976). Published by Svetozar in Petersburg, 1921. Format in-4°, 76 pages, 1 sheet of illustrations. Minor restoration.

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