Author Прокопович Сергей Николаевич Description Prokopovich, Sergey Nikolaevich (1871-1955). The length of the working day according to Russian legislation / S. Prokopovich. - Rostov-on-Don: Don. speech: N.E. Paramonov, 1905. -28 p. ; 21. - . Source of the electronic copy: PB Publisher Дон. речь Н.Е. Парамонов
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