The Combined Nomenclature (CN), v1:2023
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=72c00acf-45ba-43e2-9d08-63bdac4ce8a8