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<p>FlowingData. 2018. “Flowing Data-Website.” <a href="http://flowingdata.com/">http://flowingdata.com/</a>.</p>
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<p>Infogram. 2018. “Infogram- Data Visualization.” <a href=" https://infogram.com/page/data-visualization">https://infogram.com/page/data-visualization</a>.</p>
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