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The capitalist revolution : a history of American social thought 1890 - 1919
Tipple, John, (1970)
The social, educational, and religious state of the manufacturing districts
Baines, Edward, (1969)
Grundlagen für eine soziale Umgestaltung
Russell, Bertrand, (1921)
Advanced macroeconomics
Romer, David, (1996)
Romer, David, (2012)
Romer, David, (2001)