{"first_publish_date": "April 1982", "key": "/works/OL2434408W", "title": "Contemporary's number power 2", "created": {"type": "/type/datetime", "value": "2009-12-09T23:40:19.581741"}, "covers": [5403791], "subjects": ["Arithmetic", "Decimal system", "Fractions", "Percentage", "Problems, exercises", "Problems, exercises, etc"], "latest_revision": 4, "last_modified": {"type": "/type/datetime", "value": "2010-12-03T19:41:22.175096"}, "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL336280A"}}], "type": {"key": "/type/work"}, "revision": 4}