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3Published 1925.“…"Voprosy truda",…”
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5Published 1923.“…"Voprosy Truda",…”
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7Published 1926.“…"voprosy Truda",…”
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8Published 1925.“…"Voprosy truda",…”
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9Published 1925.“…"Voprosy truda",…”
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11Published 1923.“…"Voprosy Truda",…”
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19Published 1924.“…"Voprosy truda",…”
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20Published 1924.“…"Voprosy truda",…”
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