Columbia subject headings:
Book industries and trade--English-speaking countries--History--Congresses.
Book industries and trade--French-speaking countries--History--Congresses.
Books and reading--English-speaking countries--History--Congresses.
Books and reading--French-speaking countries--History--Congresses.
Books--History--Congresses.
Harvard subject headings:
Books and reading--English-speaking countries--Congresses.
Books and reading--French-speaking countries--Congresses.
Books--History--Congresses.
Princeton subject headings:
Books and reading--English-speaking countries--Congresses.
Books and reading--French-speaking countries--Congresses.
Books--History--Congresses.