Columbia subject headings:
Harvard subject headings:
United States--History--Civil War, 1861-1865
United States--History--Civil War, 1861-1865--Blogs.
United States--History--Civil War, 1861-1865--Sources.
Princeton subject headings:
Blogs.
United States--History--Civil War, 1861-1865--Blogs.
United States--History--Civil War, 1861-1865--Sources.