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- MARCedit > https://github.com/cmharlow/ShareFest15MetadataQA/blob/master/examples/MARCEdit/MARCvalidation.md
- National Library of Finland > https://github.com/NatLibFi/marc-record-validate/blob/master/README.md
- Catmandu > https://metacpan.org/pod/Catmandu::Validator::MARC
- ??? > https://jorol.github.io/processing-marc/#/validation
- ??? > https://pkiraly.github.io/2018/01/28/marc21-in-json/
- Anyway to use MARC4j?
Market Intelligence
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