{"subject_places": ["Germany", "Mansfeld", "Thuringia"], "subjects": ["Copper industry and trade", "Mineral industries", "Finance"], "key": "/works/OL7728124W", "title": "Die eroberung des weltmarkts durch das mansfeldische kupfer", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL2393122A"}}], "type": {"key": "/type/work"}, "latest_revision": 3, "revision": 3, "created": {"type": "/type/datetime", "value": "2009-12-10T21:43:37.744851"}, "last_modified": {"type": "/type/datetime", "value": "2023-11-14T09:48:32.783850"}}