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Puzzling pyramids


  1. Correspondence to Dr Helen Williams, Department of Radiology, Birmingham Children’s Hospital, Steelhouse Lane, Birmingham B4 6NH, UK; helen.williams32{at}
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Harborne K, Williams H
Puzzling pyramids

Publication history

  • Accepted September 6, 2017
  • First published October 22, 2017.
Online issue publication 
July 20, 2018

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