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Contribution to the "Matematika v shkole" journal
Item 4. (Name does not exist in this language.)
Item 4. (Name does not exist in this language.)
Date: 13.01.1981
Original document language: russian
Authors: Andrei Petrovich Ershov
Organizations: "Matematika v shkole" Editorial Board
Addressee: Rostislav Semyonovich Cherkasov

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