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APA Citation
BOROVIK, A. (2015). dERIVATION IN A LEVEL MATHEMATICS. Selected passages from correspondence with friends, 3, 7–. http://access.bl.uk/ark:/81055/vdc_100089798255.0x000001
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BOROVIK, A. (2015). dERIVATION IN A LEVEL MATHEMATICS. Selected passages from correspondence with friends, 3, 7–. http://access.bl.uk/ark:/81055/vdc_100089798255.0x000001