Columbia subject headings:
Book collecting--Great Britain--History--Congresses.
Book industries and trade--Great Britain--History--Congresses.
Libraries--Great Britain--History--Congresses.
Harvard subject headings:
Book collecting--Great Britain--History--Congresses.
Book industries and trade--Great Britain--History--Congresses.
Libraries--Great Britain--History--Congresses.
Princeton subject headings:
Book collecting--Great Britain--History--Congresses.
Book industries and trade--Great Britain--History--Congresses.
Libraries--Great Britain--History--Congresses.