Columbia subject headings:
Library of Congress. Geography and Map Division--Catalogs.
United States--History--Civil War, 1861-1865--Maps--Bibliography.
Harvard subject headings:
Library of Congress. Geography and Map Division--Catalogs.
United States--History--Civil War, 1861-1865--Maps--Bibliography--Catalogs.
United States--History--Civil War, 1861-1865--Maps--Bibliography.
Princeton subject headings:
Catalogs.
Library of Congress. Geography and Map Division--Catalogs.
United States--History--Civil War, 1861-1865--Maps--Bibliography--Catalogs.