2026-05-14T05:37:40Zhttp://api.socialhistoryservices.org/solr/all/oaiInternational Institute of Social Historyhttp://api.socialhistoryservices.org/solr/all/oai2.0lwo@iisg.nl2011-06-01T12:00:00ZtransientYYYY-MM-DDThh:mm:ssZnoneoaisocialhistoryservices.org:oai:socialhistoryservices.org:10622/12345-abcde