Columbia subject headings:
Harvard subject headings:
Helmholtz, Hermann von, 1821-1894
Physiologists--Germany--Biography.
Physiology--History
Science--Germany--History--19th century.
Science--History
Scientists--Germany--Biography
Princeton subject headings:
Holmholtz, Hermann von, 1821-1894.
Physiologists--Germany--Biography.
Physiology--History.
Science--History.
Scientists--Germany--Biography.