Publication identification number (NIPO)
Catalogue of Publications of the General State Administration: Https://cpage.mpr.gob.es.
You can view the entire catalog here.
NIPO: 142-22-004-2
Code belonging to the Spanish version
NIPO: 142-22-001-6
Code belonging to the Catalan version
NIPO: 142-22-002-1
Code belonging to the Galician version
NIPO: 142-22-003-7
Code belonging to the Valencian version