Columbia subject headings:
Bibliography--Congresses.
Book industries and trade--History--Congresses.
Books and reading--History--Congresses.
Harvard subject headings:
Bibliography--Congresses.
Book industries and trade--History--Congresses.
Books and reading--History--Congresses.
Princeton subject headings:
Books--Greece--History--Congresses.
Books--History--Congresses.
Publishers and publishing--History--Congresses.