{"type": {"key": "/type/work"}, "title": "Saisonale Arbeitsmigration in der Geschichte", "subjects": ["Seasonal labor", "History", "Congresses", "Migrant labor", "Emigration and immigration", "Social conditions"], "subject_places": ["Germany", "Lippe (Kreis)", "Lippe (Germany : Kreis)"], "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL11666791A"}, "role": "editor."}, {"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL258331A"}, "role": "editor."}], "key": "/works/OL45599199W", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2026-06-16T13:15:17.913488"}, "last_modified": {"type": "/type/datetime", "value": "2026-06-16T13:15:17.913488"}}