Columbia subject headings:
Drug addiction--Great Britain--History.
Drug addiction--Moral and ethical aspects--Great Britain--History.
Opium abuse--Great Britain--History.
Harvard subject headings:
Drug addiction--Great Britain--History.
Drug addiction--Moral and ethical aspects--Great Britain--History.
Opium abuse--Great Britain--History.
Princeton subject headings:
Drug addiction--Great Britain--History.
Drug addiction--Great Britain--Moral and ethical aspects--History.
Opium abuse--Great Britain--History.