Columbia subject headings:
Harvard subject headings:
Johns Hopkins University Seminary of History and Politics--History--Sources.
United States--Historiography.
United States--History--Study and teaching (Higher)--Maryland--Baltimore--History--Sources.
Princeton subject headings:
Johns Hopkins University Seminary of History and Politics--History--Sources.
United States--Historiography.
United States--History--Study and teaching (Higher)--Maryland--Baltimore--History--Sources.