Portugal

ISBN registration group 978-972 is assigned to Portugal. When you see an ISBN starting with 978-972 (after the EAN prefix 978 or 979), the book was published by a registrant within this language or country group.

Within group 978-972, the national ISBN agency sub-allocates publisher (registrant) prefixes to individual publishing houses, imprints, and self-publishers. Larger publishers receive shorter prefixes (more publication numbers); smaller presses receive longer prefixes (fewer publications).