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Simmel, Georg
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Ferrarotti, Franco
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Plummer, Ken
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Spencer, Herbert <1820-1903>
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Institut für Sozialforschung <Francoforte sul Meno>
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Groppali, Alessandro
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Michels, Roberto
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Klein, Josephine
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Gumplowicz, Ludwig
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Veblen, Thorstein
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Villa, Guido <1867-1949>
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Searle, John Rogers
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