{"last_modified": {"type": "/type/datetime", "value": "2010-07-16T13:19:58.652875"}, "created": {"type": "/type/datetime", "value": "2009-10-23T03:10:13.863711"}, "title": "Die mikroskopische Beschaffenheit der Mineralien und Gesteine", "covers": [6231663], "first_publish_date": "1873", "latest_revision": 4, "key": "/works/OL230446W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL2503549A"}}], "type": {"key": "/type/work"}, "subjects": ["Petrology", "Mineralogy, Determinative", "Mineralogy", "Determinative Mineralogy"], "revision": 4}