Danish Antiquarian Booksellers Association

The Danish Antiquarian Booksellers' Association (Danish: Den Danske Antikvarboghandlerforening ABF) is a Danish organization of professional antiquarian booksellers. It is the oldest league of antiquarian booksellers in Scandinavia as well as one of the oldest of its kind in the world, only preceded by the English ABA and the French SLAM. The purpose of the association is to standardize the descriptions of books, preserve and develop the trade, and represent the trade to the public.

Source: Wikipedia — Danish Antiquarian Booksellers Association (CC BY-SA 4.0)