2026-03-12T16:03:41Z http://dbkapps.gesis.org/dbkoai/oai.asp ASP OAI 2.0 Data Provider for GESIS Data Catalogue DBK - Instance 1 http://dbkapps.gesis.org/dbkoai/oai.asp 2.0 dbk-technik@gesis.org 2015-01-01 no YYYY-MM-DD oai dbk.gesis.org : oai:dbk.gesis.org:COL/ZA10000