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MLA Citation
David A. J (David Allan John) Seargent. Visually observing comets. Cham, Switzerland : Springer, 2017. http://access.bl.uk/ark:/81055/vdc_100077079044.0x000001
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David A. J (David Allan John) Seargent. Visually observing comets. Cham, Switzerland : Springer, 2017. http://access.bl.uk/ark:/81055/vdc_100077079044.0x000001