{"subject_places": ["United States"], "subjects": ["Emigration and immigration", "Historiography", "American Historians", "Historians", "History"], "key": "/works/OL18316365W", "title": "American historians and European immigrants, 1875-1925", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL2206086A"}}], "type": {"key": "/type/work"}, "covers": [14867899], "latest_revision": 3, "revision": 3, "created": {"type": "/type/datetime", "value": "2019-02-05T12:39:53.734061"}, "last_modified": {"type": "/type/datetime", "value": "2025-04-24T17:32:08.463242"}}