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The rich, the poor, and the middle class : thresholds and intensity indices
Eisenhauer, Joseph G., (2011)
Rossija: novaja socialʹnaja realʹnostʹ: bogatye, bednye, srednij klass
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Progressive inequality : rich and poor in New York, 1890-1920
Huyssen, David N., (2014)
Položenie ženščin v stranach kapitalizma: ėkonomičeskie i socialʹnye aspekty
Dubson, Boris I., (1988)