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MLA Citation
Simon James. An introduction to data analysis using aggregation functions in R. Cham, Switzerland : Springer, 2016. http://access.bl.uk/ark:/81055/vdc_100073627851.0x000001
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Simon James. An introduction to data analysis using aggregation functions in R. Cham, Switzerland : Springer, 2016. http://access.bl.uk/ark:/81055/vdc_100073627851.0x000001