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Place
- Washington (D.C.)9
- England--London8
- New York (State)8
- White House (Washington, D.C.)4
- Germany--Berlin3
- Illinois--Chicago3
- New York (State)--New York3
- Pennsylvania--Philadelphia3
- Massachusetts--Boston2
- Pennsylvania--Ambler2
- Pennsylvania--Tarentum2
- Scotland2
- California--Fullerton1
- California--Los Altos1
- Colorado--Loveland1
- Connecticut--New Haven1
- Delaware--Wilmington1
- Germany--Kempten1
- Naval Research Laboratory (U.S.)1
- Ohio--Columbus1