Columbia subject headings:
Harvard subject headings:
O'Sullivan, Timothy H., 1840-1882.
Photography, Artistic
United States--History--Civil War, 1861-1865--Pictorial works.
West (U.S.)--Pictorial works.
Princeton subject headings:
Photography, Artistic.
United States--History--Civil War, 1861-1865--Pictorial works.
West (U.S.)--Pictorial works.