Columbia subject headings:
Harvard subject headings:
Libraries--Special collections--Newspapers--Congresses.
Newspapers--Collectors and collecting--Congresses.
Newspapers--Conservation and restoration--Congresses.
Newspapers--Library resources--Congresses.
Serials librarianship.
Princeton subject headings:
Newspapers--Collectors and collecting--Congresses.
Newspapers--Conservation and restoration--Congresses.
Newspapers--Library resources--Congresses.