Paul Ernest Klopsteg (May 30, 1889 – April 28, 1991) was an American physicist.
He performed ballistics research during World War I at the US Army's Aberdeen Proving Grounds in Maryland.
In 1979, aged 90, he was the first and so far (as of February 2016) only person to receive an Extraordinary Oersted Medal Award.
Second edition, revised, 1947, published by the author, 2424 Lincolnwood Drive, Evanston, Illinois Hickman, C. N.; Nagler, Forrest; Klopsteg, Paul E. (1947), Archery: The Technical Side.
A compilation of scientific and technical articles on theory, construction, use and performance of bows and arrows, reprinted from journals of science and of archery, National Field Archery Association.