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Intellectual competitions for schoolchildren: Main tasks and social significance - PDF (Russian)
Copyright (c) 2020 Slizovskiy D.E., Ivanova M.G., Martynenko E.V.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright (c) 2020 Slizovskiy D.E., Ivanova M.G., Martynenko E.V.
This work is licensed under a Creative Commons Attribution 4.0 International License.