Chapman, Allan. “Thomas Harriot: The First Telescopic Astronomer.” Journal of the British Astronomical Association, vol. 118, no. 6, Dec. 2008, pp. 315325.   EBSCOhost, web.a.ebscohost.com/ehost/pdfviewer/pdfviewer?vid=1&sid=32fbc66b-8980-469d-9489-9856cf381378%40sessionmgr4006. Accessed 5 October 2017. 

Chapman, Allan
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