Columbia subject headings:
Libraries--Canada.
Libraries--United States.
Manuscripts--Canada--Bibliography.
Manuscripts--United States--Bibliography.
Union catalogs.
Harvard subject headings:
Libraries--Canada
Libraries--United States
Manuscripts--Canada--Catalogs--Union lists.
Manuscripts--Canada--Union lists.
Manuscripts--United States--Catalogs--Union lists.
Manuscripts--United States--Union lists.
Union catalogs
Princeton subject headings:
Libraries--Canada.
Libraries--United States.
Manuscripts--Canada--Bibliography.
Manuscripts--United States--Bibliography.
Union catalogs.