Steinberg, Issac Nachman, 1888-1957.
Steinberg (or Izaak Zakharovich Shteĭnberg) was a Left Socialist Revolutionary who served in the Russian coalition government after the October 1917 revolution.
From the description of Isaac Nachman Steinberg Collection, ca. 1918-1925. (Columbia University In the City of New York). WorldCat record id: 320410089
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