Columbia subject headings:
Architecture--Pennsylvania--Pittsburgh--Guidebooks.
Pittsburgh (Pa.)--Buildings, structures, etc.--Guidebooks.
Pittsburgh (Pa.)--Tours.
Pittsburgh Region (Pa.)--Tours.
Harvard subject headings:
Architecture--Pennsylvania--Pittsburgh--Guidebooks.
Pittsburgh (Pa.)--Buildings, structures, etc.--Guidebooks.
Pittsburgh (Pa.)--Tours.
Pittsburgh Region (Pa.)--Tours.
Princeton subject headings:
Architecture--Pennsylvania--Pittsburgh--Guidebooks.
Pittsburgh (Pa.)--Buildings, structures, etc.--Guidebooks.
Pittsburgh (Pa.)--Description--Tours.
Pittsburgh Region (Pa.)--Description and travel--Tours.