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Seasonal change of the psychical and emotional state of students in the conditions of northern region - PDF (Russian)
Copyright (c) 2010 Чеснокова В.Н.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright (c) 2010 Чеснокова В.Н.
This work is licensed under a Creative Commons Attribution 4.0 International License.