{"created": {"type": "/type/datetime", "value": "2009-12-10T20:49:31.068260"}, "subjects": ["Mathematics", "Study and teaching (Elementary)"], "latest_revision": 5, "key": "/works/OL7296936W", "title": "Teaching mathematics in the modern elementary school", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL2140248A"}}], "type": {"key": "/type/work"}, "last_modified": {"type": "/type/datetime", "value": "2020-10-04T10:37:39.514586"}, "covers": [9772045], "revision": 5}