Columbia subject headings:
Aerial views--Canada--Catalogs.
Aerial views--United States--Catalogs.
Cities and towns--Canada--Maps--Maps--Bibliography.
Cities and towns--United States--Maps--Maps--Bibliography.
Library of Congress. Geography and Map Division--Catalogs.
Maps.
Harvard subject headings:
Aerial views--Canada--Catalogs.
Aerial views--United States--Catalogs.
Cities and towns--Canada--Maps--Bibliography--Catalogs.
Cities and towns--Canada--Maps--Maps--Bibliography.
Cities and towns--United States--Maps--Bibliography--Catalogs.
Cities and towns--United States--Maps--Maps--Bibliography.
Library of Congress. Geography and Map Division--Catalogs.
Princeton subject headings:
Cities and towns--Canada--Maps--Bibliography--Catalogs.
Cities and towns--United States--Maps--Bibliography--Catalogs.
Library of Congress. Geography and Map Division--Catalogs.