Columbia subject headings:
Harvard subject headings:
Hotels--Canada--Directories.
Hotels--Directories.
Hotels--United States--Directories.
Railroads--Canada--Directories.
Railroads--United States--Directories
Resorts--Canada--Directories.
Resorts--United States--Directories
Tourist camps, hostels, etc.--Directories.
Princeton subject headings:
Directories.
Hotels--Directories.
Tourist camps, hostels, etc.--Directories.