Cite
APA Citation
Heiny, K. (2017). Standard Deviation. Place of publication not identified : HarperCollins Publishers. http://access.bl.uk/ark:/81055/vdc_100055691497.0x000001
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Heiny, K. (2017). Standard Deviation. Place of publication not identified : HarperCollins Publishers. http://access.bl.uk/ark:/81055/vdc_100055691497.0x000001