Columbia subject headings:
Cultural property--Protection--Massachusetts--Salem.
Historic sites--Massachusetts--Salem--Planning.
Salem Maritime National Historic Site (Mass.)
Harvard subject headings:
Cultural property--Protection--Massachusetts--Salem.
Historic sites--Massachusetts--Salem--Planning.
Salem Maritime National Historic Site (Mass.)
Princeton subject headings:
Cultural property--Protection--Massachusetts--Salem.
Historic sites--Massachusetts--Salem--Planning.
Salem Maritime National Historic Site (Mass.)