Columbia subject headings:
Adrenergic beta blockers--Research--History.
Calcium--Antagonists--Research--History.
Drugs--Design.
Drugs--Research.
Harvard subject headings:
Adrenergic beta blockers--Research--History.
Calcium--Antagonists--Research--History.
Drugs--Design.
Drugs--Research.
Princeton subject headings:
Adrenergic beta blockers--Research--History.
Calcium--Antagonists--Research--History.
Drugs--Design.
Drugs--Research.