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Version 3.0.4 -- Revision 4
ONIX Code List 40 41 ONIX_BookProduct_Codelists_Issue_4041_Changes.pdf
Version 2.1.3 – Revision 3 (Revision 4 is largely about changes for Japan)
ONIX Code List Issue 36 is the last code list that should be used for ONIX 2.1
BISAC Subject Code list 2017 edition and Regional Themes
The overview of ONIX for Books at the Editeur website.
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