Columbia subject headings:
Popular literature--Publishing--United States--History--19th century.
Publishers and publishing--United States--History--19th century.
Harvard subject headings:
Popular literature--Publishing--United States--History--19th century.
Publishers and publishing--United States--History--19th century.
Princeton subject headings:
Popular literature--Publishing--United States--History--19th century.
Publishers and publishing--United States--History--19th century.