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    Re: The Bygrave
    From: Douglas Denny
    Date: 2009 Jul 4, 19:01 -0700

    source:
    The Journal of Navigation‎ - Page 136
    Institute of Navigation (Great Britain) - 1955
    article:
    "Automatic Dead Reckoning and Navigation Instruments for Aircraft" by H.C. Pritchard
    extract:
    ==============
    
    In fact it was published in 1956 in Vol. IX  of 'The Journal Of the Institute of Navigation'
    
    Here is the first page.
    
    Douglas Denny.
    Chichester.  England.
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