Columbia subject headings:
Harvard subject headings:
Medical statistics--History--19th century.
Medicine--United States--History--19th century
Medicine--United States--Statistical services--History--19th century.
Statistics--History
United States--Statistics, Medical--History--19th century.
Princeton subject headings:
Medical statistics--History--19th century.
Medicine--United States--History--19th century.
Medicine--United States--Statistical services--History--19th century.
United States--Statistics, Medical--History--19th century.