Columbia subject headings:
Writing--Congresses.
Writing--History--20th century--Congresses.
Writing--History--21st century--Congresses.
Harvard subject headings:
Autographs--Technological innovations--History--20th century--Congresses.
Autographs--Technological innovations--History--21st century--Congresses.
Manuscripts--Technological innovations--History--20th century--Congresses.
Manuscripts--Technological innovations--History--21st century--Congresses.
Penmanship--History--20th century--Congresses.
Penmanship--History--21st century--Congresses.
Writing--Congresses.
Writing--History--20th century--Congresses.
Writing--History--21st century--Congresses.
Princeton subject headings:
Writing--Congresses.
Writing--History--20th century--Congresses.
Writing--History--21st century--Congresses.