Publication identification number (NIPO)
Publications Catalogue of the General State Administration:https://cpage.mpr.gob.es.
You can browse the entire catalogue here.
NIPO:142-22-013-9
Code pertaining to the English version
NIPO:142-22-014-4
Code belonging to the Catalan version
NIPO:142-22-015-X
Code from Galician version
NIPO:142-22-011-8
Code belonging to the Valencian language version
NIPO:142-22-012=-3
Code pertaining to the English version