{"created": {"type": "/type/datetime", "value": "2009-12-10T09:01:21.112361"}, "subjects": ["Mining engineering"], "latest_revision": 4, "key": "/works/OL5201013W", "title": "Notes and formulae for mining students", "authors": [{"type": "/type/author_role", "author": {"key": "/authors/OL1162523A"}}], "type": {"key": "/type/work"}, "last_modified": {"type": "/type/datetime", "value": "2020-08-13T11:33:31.409963"}, "covers": [5774484], "revision": 4}