Columbia subject headings:
Book industries and trade--Europe, German-speaking--History--18th century--Congresses.
Book industries and trade--Europe, German-speaking--History--19th century--Congresses.
Publishers and publishing--Europe, German-speaking--History--18th century--Congresses.
Publishers and publishing--Europe, German-speaking--History--19th century--Congresses.
Harvard subject headings:
Book industries and trade--Europe--History--19th century--Congresses.
Book industries and trade--Germany--History--19th century--Congresses.
Princeton subject headings:
Book industries and trade--Europe, German-speaking--History--18th century--Congresses.
Book industries and trade--Europe, German-speaking--History--19th century--Congresses.
Publishers and publishing--Europe, German-speaking--History--18th century--Congresses.
Publishers and publishing--Europe, German-speaking--History--19th century--Congresses.