The Combined Nomenclature (CN), v1:2025
4820: Registers, account books, notebooks, order books, receipt books, letter pads, memorandum pads, diaries and similar articles, exercise books, blotting
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=07469aa8-16e3-44d3-bd95-f5f4a5cf5be9