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Correspondence
Outgoing mail (1984)
Covering letter (hand-written)
Covering letter (hand-written)
Date: 20.06.1984
Original document language: russian
Authors: Andrei Petrovich Ershov
Organizations: Research Inst. of Education Content and Methods
Persons: Valentin A. Koptyug, Michael A. Prokofiev
Addressee: Vadim M. Monahov

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