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by Tignor, Robert; Adelman, Jeremy; Brown, Peter; et al.
by Pollard, Elizabeth; Rosenberg, Clifford; Tignor, Robert; et al.
by Marx, Karl; Engels, Friedrich; Malia, Martin; et al.
by Kotkin, Stephen
by Tignor, Robert; Adelman, Jeremy; Aron, Stephen; et al.
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