ARRAY_TO_STRING(ARRAY_ACCUM( DISTINCT publisher.value), ', ') AS publisher,
ARRAY_TO_STRING(ARRAY_ACCUM( DISTINCT SUBSTRING(pubdate.value FROM $$\d+$$) ), ', ') AS pubdate,
ARRAY_ACCUM( DISTINCT SUBSTRING(isbn.value FROM $$^\S+$$) ) AS isbn,
- ARRAY_ACCUM( DISTINCT SUBSTRING(issn.value FROM $$^\S+$$) ) AS issn
+ ARRAY_ACCUM( DISTINCT SUBSTRING(REGEXP_REPLACE(issn.value, E'^\\s*(\\d{4})[-\\s](\\d{3,4}x?)\\s*', E'\\1 \\2') FROM 1 FOR 9) ) AS issn
FROM biblio.record_entry r
LEFT JOIN metabib.full_rec title ON (r.id = title.record AND title.tag = '245' AND title.subfield = 'a')
LEFT JOIN metabib.full_rec author ON (r.id = author.record AND author.tag IN ('100','110','111') AND author.subfield = 'a')