Fisher, Ronald Aylmer, Sir, 1890-1962Ashby, Eric2011-11-222011-11-222011-11-21http://hdl.handle.net/2440/675589 October 1934 - 19 October 1955. 21 letters, notes and cards (principally on analysis of data in relation to variance)enCorrespondence with Sir Eric Ashby (Imperial College of Science and Technology, London)Letter