Columbia subject headings:
Architecture, Domestic--Massachusetts--Marblehead--Guidebooks.
Architecture, Domestic--Massachusetts--Salem--Guidebooks.
Dwellings--Massachusetts--Marblehead--Guidebooks.
Dwellings--Massachusetts--Salem--Guidebooks.
Marblehead (Mass.)--Guidebooks.
Salem (Mass.)--Guidebooks.
Harvard subject headings:
Architecture, Domestic--Massachusetts--Marblehead--Guidebooks.
Architecture, Domestic--Massachusetts--Salem--Guidebooks.
Marblehead (Mass.)--Buildings, structures, etc.--Guidebooks.
Marblehead (Mass.)--Guidebooks.
Salem (Mass.)--Buildings, structures, etc.--Guidebooks.
Salem (Mass.)--Guidebooks.
Princeton subject headings: