Columbia subject headings:
Harvard subject headings:
Biology--History--19th century.
Biology--History--20th century.
System theory--History--19th century.
System theory--History--20th century.
Systems biology.
Princeton subject headings:
Biology--History--19th century.
Biology--History--20th century.
System theory--History--19th century.
System theory--History--20th century.
Systems biology.