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Author(s): Ermakov, I. D. Title: [Psychical activity of children up to 3 years of age, and its expression in their drawings] Subject(s): Child Psychology: Methods of research Journal Title Abbreviation: J. psikol. nevr. Place of Publication: Moskva Date of Publication: 1922 Pagination: Suppl. 1, 22–38, 5 pl. Language: Russian Type of Resource: Analytic Series/Volume/Page: Series 4/Volume 3/Page 538