Ronald Edward Zupko (born 5 August 1938) is an authority on historical metrology (the study of the history of weights and measures) with an academic background in medieval history. He is known for his books on the history of weights and measures, and has written numerous dictionary and encyclopedia entries on historical measurement units.Born in Youngstown, Ohio, Zupko received his Ph.D. from the University of Wisconsin–Madison and taught at Marquette University from 1966 until retiring in 2002.Professor Zupko is a member of the Comité International pour la Métrologie Historique, Institute for Advanced Study (associate member), Mediaeval Academy of America, Economic History Association, National Association of Watch and Clock Collectors, Midwest Medieval Association, Pi Gamma Mu, and Phi Alpha Theta. Read more or edit on Wikipedia
