Correspondence, documents, speeches, lectures and lecture notes, scientific manuscripts, calculations, reports, photos and technical slides, autobiographical sketch, school notebooks, and other papers, relating to von Kr̀mǹ's role in organizing and directing the Aerodynamical Institute at the University of Aachen, the Aerojet-General Corporation, the Guggenheim Aeronautical Laboratory and the Jet Propulsion Laboratory at the California Institute of Technology; to his work in establishing the NATO Advisory Group for Aeronautical Research and Development and an International Congress of Applied Mechanics to promote international cooperation among scientists, as consultant with Handley-Page, Ltd. (English), Junkers Airplane works (Germany), Kawanishi Aircraft Company (Japan), Luftschiffbau Zeppelin, the U. S. Air Force, and the U. S. Army Air Corps, and as chairman of the USAF Scientific Advisory Board; and to the Tacoma Bridge investigation. Includes papers and documents belonging to his father, Moritz von Kr̀mǹ, Hungarian Commissioner of the Ministry of Education. Correspondents include General Henry H. Arnold, Arnold Berliner, Otto Blumenthal, Hans Bolza, Max Born, J. M. Burgers, Richard Courant, G. Gabrielli, the Guggenheim family, J. C. Hunsaker, T. Levi-Civita, Robert A. Millikan, Richard von Mises, Ludwig Prandtl, G. I. Taylor, and other scientists, industrial leaders, and public figures.