Columbia subject headings:
Bibliography--Congresses.
Book industries and trade--History--Congresses.
Booksellers and bookselling--Great Britain--History--Congresses.
Harvard subject headings:
Bibliography--Congresses
Book industries and trade--History--Congresses.
Booksellers and bookselling--Great Britain--History--Congresses.
Princeton subject headings:
Bibliography--Congresses.
Book industries and trade--History--Congresses.
Booksellers and bookselling--Great Britain--History--Congresses.