Columbia subject headings:
American newspapers--Bibliography--Union lists.
Newspapers in microform--Bibliography--Union lists.
Union catalogs.
Harvard subject headings:
American newspapers--Bibliography--Union lists.
American newspapers--Microform catalogs.
Newspapers in microform--Bibliography--Union lists.
Union catalogs.
Princeton subject headings:
American newspapers--Bibliography--Union lists.
American newspapers--Microform catalogs.
Newspapers in microform--Bibliography--Union lists.
Union catalogs.