{"subjects": ["Problems, exercises", "Dental materials", "Dental Materials"], "key": "/works/OL19004532W", "title": "Dental materials", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL26354A"}}], "type": {"key": "/type/work"}, "covers": [4416357], "latest_revision": 2, "revision": 2, "created": {"type": "/type/datetime", "value": "2019-02-18T23:47:36.528185"}, "last_modified": {"type": "/type/datetime", "value": "2023-01-10T21:11:32.217338"}}