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Gerard L'Estrange Turner
1926 - 2012
Gerard L'E. Turner was a Senior Research Associate at the Museum of the History of Science, Oxford. He iwas an authority on the history of the microscope and other scientific instruments.
Gerard L'Estrange Turner, Elizabethan Instrument Makers, http://www.amazon.com/Elizabethan-Instrument-Makers-Origins-Precision/dp/0198565666 (accessed 07/20/2015)
"Professor Gerard Turner," The Telegraph, http://www.telegraph.co.uk/news/obituaries/science-obituaries/9500927/Professor-Gerard-Turner.html (accessed 07/20/2015)