The Petrograd Workers and the Fall of the Old Regime: From the February Revolution to the July Days, 1917

This is volume one of Mandel's two volume study of the Russian Revolution from the perspective of the workers themselves. The two volumes were combined and updated recently, and published by Haymarket Books under the title "The Petrograd Workers in the Russian Revolution"
https://www.haymarketbooks.org/books/1193-the-petrograd-workers-in-the-russian-revolution