Columbia subject headings:
Corn laws (Great Britain)--Congresses.
Foreign trade regulation--Congresses.
Free trade--Congresses.
Free trade--Moral and ethical aspects--Congresses.
Free trade--Political aspects--Congresses.
International trade--Congresses.
Harvard subject headings:
Corn laws (Great Britain)--Congresses.
Foreign trade regulation--Congresses
Free trade--Congresses
Free trade--Moral and ethical aspects--Congresses.
Free trade--Political aspects--Congresses.
International trade--Congresses
Princeton subject headings:
Corn laws (Great Britain)--Congresses.
Free trade--Congresses.
Free trade--Political aspects--Congresses.
International trade--Congresses.