Columbia subject headings:
Canada--History--Societies, etc.--Directories.
Historical museums--Canada--Directories.
Historical museums--United States--Directories.
United States--History--Societies, etc.--Directories.
Harvard subject headings:
Canada--History--Societies, etc.--Directories.
Historical museums--Canada--Directories.
Historical museums--United States--Directories.
United States--History--Societies, etc.--Directories.
Princeton subject headings:
Canada--History--Societies, etc.--Directories.
Historical museums--Canada--Directories.
Historical museums--United States--Directories.
United States--History--Societies, etc.--Directories.