235, 2726-2439 (1960) ↑ University of Pennsylvania Archival Collection ↑ US Sailing Medalists Archived 2008-03-22 at the Wayback Machine. ↑ National Science Foundation - The President's National Medal of Science ↑ "List of Members". www.leopoldina.org. Retrieved 19 October 2017. ↑ Weber, Bruce (2010-11-28).