2026-04-09T02:48:00Z https://eds.yildiz.edu.tr/sigma/ajaxtool/oai rfc1807 http://www.openarchives.org/OAI/1.1/rfc1807.xsd http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1807.txt nlm http://dtd.nlm.nih.gov/publishing/2.3/xsd/journalpublishing.xsd http://td.nlm.nih.gov/publishing/2.3 oai_dc http://www.openarchives.org/OAI/2.0/oai_dc.xsd http://www.openarchives.org/OAI/2.0/oai_dc/ marcxml http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd http://www.loc.gov/MARC21/slim oai_marc http://www.openarchives.org/OAI/1.1/oai_marc.xsd http://www.openarchives.org/OAI/1.1/oai_marc