{"subject_places": ["Research", "United States"], "subjects": ["Education", "Evaluation", "School principals", "United States", "School superintendents and principals", "Education, research", "Education, united states"], "key": "/works/OL4228261W", "title": "Die Effective School Forschung der USA", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL809855A"}}], "type": {"key": "/type/work"}, "covers": [13346822], "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2009-12-10T05:43:46.574564"}, "last_modified": {"type": "/type/datetime", "value": "2023-02-24T19:07:38.263547"}}