- Rogers, Jerry R. (3)
- ASCE National Convention (2)
- American Society of Civil Engineers. Committee on History and Heritage of American Civil Engineering (2)
- National Congress on Civil Engineering History and Heritage (2)
- United States. National Park Service (2)
- American Society of Civil Engineers. Committee on History and Heritage of American Civil Engineers (1)
- American Society of Civil Engineers. National Capital Section (1)
- Boston Society of Civil Engineers (1)
- Fredrich, Augustine J. (1)
- National Symposium on Civil Engineering History (1)
- United States Capitol Historical Society (1)